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Wednesday, 05/07/2025 1:15 PM 
 RecordStarterOpenLatest
 Gm#W-LPitcherMLO/UMLO/URL
 PIT Pittsburgh95112-26KELLER(R)+1507.5o-15+1707.5o-15+1.5, -130
 STL Saint Louis95219-19GRAY(R)-1607.5u-05-1807.5u-05-1.5, +110

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Team Bullpen Breakdown

Explore comprehensive MLB bullpen rosters featuring standard and Sabermetric pitching stats, plus updated injury reports to evaluate each team's relief pitching depth.

Pitcher Injuries

Stay updated with each MLB team's key impact player injury details. Find statuses, injury types, and game effect for a competitive edge in baseball insights.

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 Pittsburgh Pirates
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Justin LawrenceP Elbow60-day IL05/07/202510011.351106150.790.971
Justin Lawrence (P) of the Pirates is on the 60-day IL with right elbow inflammation, out indefinitely. Next game: 05/07/2025.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Derek DiamondSP Undisclosed7-day IL05/07/20250000.00000000.000.000
Derek Diamond (SP, Pirates) placed on 7-day IL due to an unknown issue; next game on 05/07/2025 vs. St. Louis.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Cristofer MelendezP Undisclosed60-day IL05/07/20250000.00000000.000.000
Cristofer Melendez (P) is on the 60-day IL for the Pirates with an unknown injury. Next game is 05/07/2025 at St. Louis.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Dauri MoretaP Elbow60-day IL05/07/20250000.00000000.000.000
Dauri Moreta (P, Pirates) on 60-day IL due to elbow injury; next game is 05/07/2025 vs. St. Louis. Updated info as of 05/07/2025.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Tim MayzaP Shoulder60-day IL05/07/20250009.39331182.891.071
Tim Mayza of the Pirates is on the 60-day IL with a shoulder injury, and there’s no return timetable. Next game: 05/07/2025.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Johan OviedoP Lat60-day IL05/07/20250000.00000000.000.000
Johan Oviedo (PIR) is on the 60-day IL with a right elbow and lat strain, sidelined indefinitely. Next game: 05/07/2025.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Carlson ReedSP Back60-day IL05/07/20250000.00000000.000.000
Carlson Reed, SP for the Pirates, is on the 60-day IL due to a back injury. Next game is 05/07/2025 at St. Louis.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Jared JonesP Elbow60-day IL05/07/20250000.00000000.000.000
Jared Jones of the Pirates is on the 60-day IL with a right elbow UCL sprain and will be out indefinitely.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Burch SmithRP Undisclosed7-day IL05/07/20250000.00000000.000.000
Burch Smith (RP) on 7-day IL for Pittsburgh Pirates; next game 05/07/2025 at St. Louis. Status: Unknown.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Andres SilveraP Undisclosed60-day IL05/07/20250000.00000000.000.000
Andres Silvera (P) on 60-day IL for Pittsburgh Pirates; next game on 05/07/2025 at St. Louis; update as of 05/07/2025.
 Saint Louis Cardinals
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Sem RobberseP Undisclosed7-day IL05/07/20250000.00000000.000.000
Sem Robberse of the St. Louis Cardinals is on the 7-day IL with an unknown injury. Next game: 05/07/2025 vs. Pittsburgh.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Chen-Wei LinSP Undisclosed7-day IL05/07/20250000.00000000.000.000
Chen-Wei Lin of the St. Louis Cardinals is on the 7-day IL with an unknown issue. Next game: 05/07/2025 vs. Pittsburgh.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Quinn MatthewsSP Shoulder7-day IL05/07/20250000.00000000.000.000
Quinn Matthews of the St. Louis Cardinals is on the 7-day IL due to a shoulder injury, next game on 05/07/2025 vs. Pittsburgh.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Drew RomSP Shoulder7-day IL05/07/20250000.00000000.000.000
Drew Rom (SP, Cardinals) on 7-day IL with shoulder injury; next game 05/07/2025 vs. Pittsburgh.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Cooper HjerpeSP Elbow60-day IL05/07/20250000.00000000.000.000
Cooper Hjerpe (SP) on 60-day IL for elbow injury. Next game: 05/07/2025 vs. Pittsburgh. Info updated 05/07/2025.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Rob KaminskyRP Undisclosed7-day IL05/07/20250000.00000000.000.000
Rob Kaminsky (RP) on 7-day IL for St. Louis Cardinals; status unknown. Next game on 05/07/2025 vs. Pittsburgh.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Packy NaughtonSP Elbow60-day IL05/07/20250000.00000000.000.000
Packy Naughton (SP) on 60-day IL with an elbow injury; next game for Cardinals is 05/07/2025 vs. Pittsburgh.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Victor SantosP Undisclosed60-day IL05/07/20250000.00000000.000.000
Victor Santos of the St. Louis Cardinals is on the 60-day IL with an unknown injury. Next game: 05/07/2025 vs. Pittsburgh.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Tink HenceSP Ribs60-day IL05/07/20250000.00000000.000.000
Tink Hence placed on 60-day IL with a rib injury; next game for Cardinals is on 05/07/2025 against Pittsburgh.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Zack ThompsonP Lat60-day IL05/07/20250000.00000000.000.000
Zack Thompson, STL Cardinals P, is on the 60-day IL with a Grade 1 lat strain, expected to return in early June.
PlayerPosInjuryStatusUpdatedWLSVIPHRERHRBBSOERAWHIP
Brian HolidaySP Undisclosed7-day IL05/07/20250000.00000000.000.000
Brian Holiday of the St. Louis Cardinals is on the 7-day IL; status is unknown. Next game: 05/07/2025 vs. Pittsburgh.

Bullpen Pitching Stats

2025 Pitching Stats in All Games

This table displays pitching statistics for a team's bullpen, highlighting the expected available pitchers for today's game. Key stats such as ERA, WHIP, saves, and opponents' batting averages are included to help bettors and fantasy managers evaluate bullpen strength. Pitchers highlighted in white rows are projected to be available for relief appearances, while players shown in grey rows are currently unavailable or listed as starting pitchers. Favorable and unfavorable performance indicators are clearly marked in green and red, respectively, allowing for quick identification of bullpen advantages or vulnerabilities.

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 Pittsburgh Bullpen - 2025 All Games Pitching Statistics
Player
T
 W L ERA G HLD SV BSV SV% IP H R ER HR BB IBB HBP SO WP BK WHIP AVGa OBPa SLGa OPSa
Dennis Santana
R
 0 1 1.26 15 4 3 0 100.0% 14.3 9 3 2 0 3 0 0 9 0 0 0.837 0.191 0.240 0.277 0.517
Caleb Ferguson
L
 1 0 4.50 17 4 0 1 0.0% 16.0 15 8 8 0 7 1 1 9 0 0 1.375 0.259 0.348 0.310 0.659
Ryan Borucki
L
 0 0 3.07 16 5 0 1 0.0% 14.7 9 6 5 0 4 1 0 13 2 1 0.886 0.176 0.236 0.255 0.491
David Bednar
R
 0 3 5.00 11 2 3 0 100.0% 9.0 10 6 5 1 3 1 0 11 2 0 1.444 0.278 0.333 0.500 0.833
Colin Holderman
R
 0 1 8.18 11 1 0 2 0.0% 11.0 14 10 10 3 7 0 2 9 1 0 1.909 0.333 0.451 0.595 1.046
Joey Wentz
L
 1 1 3.44 14 0 0 0 0.0% 18.3 15 9 7 2 9 2 1 15 0 0 1.309 0.217 0.316 0.348 0.664
Chase Shugart
R
 1 2 3.68 13 0 0 1 0.0% 14.7 12 6 6 2 4 0 0 11 1 0 1.091 0.218 0.271 0.382 0.653
Tim Mayza
L
 0 0 2.89 7 0 0 0 0.0% 9.3 9 3 3 1 1 0 1 8 0 0 1.071 0.243 0.282 0.432 0.714
Justin Lawrence
R
 1 0 0.79 11 3 0 1 0.0% 11.3 5 1 1 0 6 1 2 15 1 0 0.971 0.139 0.295 0.222 0.518
Tanner Rainey
R
 0 0 0.00 1 0 0 0 0.0% 1.0 0 0 0 0 0 0 0 2 0 0 0.000 0.000 0.000 0.000 0.000
Dauri Moreta
R
 0 0 0.00 0 0 0 0 0.0% 0.0 0 0 0 0 0 0 0 0 0 0 0.000 0.000 0.000 0.000 0.000
Michael Burrows
R
 0 0 0.00 0 0 0 0 0.0% 0.0 0 0 0 0 0 0 0 0 0 0 0.000 0.000 0.000 0.000 0.000
Paul Skenes
R
 3 4 2.77 8 0 0 0 0.0% 48.7 34 17 15 4 12 0 1 47 1 0 0.945 0.192 0.247 0.322 0.569
Bailey Falter
L
 1 3 5.06 7 0 0 0 0.0% 37.3 34 25 21 6 11 0 1 28 2 0 1.205 0.252 0.313 0.444 0.757
Andrew Heaney
L
 2 3 3.18 7 0 0 0 0.0% 39.7 31 14 14 4 13 0 2 34 0 0 1.109 0.212 0.286 0.377 0.662
Carmen Mlodzinski
R
 1 3 6.16 7 0 0 0 0.0% 30.7 41 21 21 4 10 0 1 24 0 0 1.663 0.318 0.371 0.488 0.860
Johan Oviedo
R
 0 0 0.00 0 0 0 0 0.0% 0.0 0 0 0 0 0 0 0 0 0 0 0.000 0.000 0.000 0.000 0.000
Jared Jones
R
 0 0 0.00 0 0 0 0 0.0% 0.0 0 0 0 0 0 0 0 0 0 0 0.000 0.000 0.000 0.000 0.000

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 Saint Louis Bullpen - 2025 All Games Pitching Statistics
Player
T
 W L ERA G HLD SV BSV SV% IP H R ER HR BB IBB HBP SO WP BK WHIP AVGa OBPa SLGa OPSa
Ryan Helsley
R
 1 0 3.46 13 0 6 2 75.0% 13.0 12 5 5 1 8 1 1 13 1 0 1.538 0.250 0.368 0.354 0.723
Phil Maton
R
 0 1 3.60 17 8 1 1 50.0% 15.0 15 7 6 0 3 0 2 18 0 0 1.200 0.250 0.308 0.300 0.608
Steven Matz
L
 2 0 1.44 10 2 1 1 50.0% 25.0 21 5 4 0 3 0 1 21 1 0 0.960 0.223 0.255 0.266 0.521
John King
L
 0 0 5.40 13 1 0 1 0.0% 11.7 18 9 7 2 5 0 0 6 0 0 1.971 0.346 0.404 0.519 0.923
Kyle Leahy
R
 0 0 1.21 18 9 0 1 0.0% 22.3 7 3 3 2 7 0 1 19 0 0 0.627 0.097 0.188 0.194 0.382
JoJo Romero
L
 1 3 5.73 14 3 0 0 0.0% 11.0 9 8 7 1 8 2 0 8 0 0 1.545 0.250 0.386 0.361 0.747
Chris Roycroft
R
 0 2 6.14 9 2 0 0 0.0% 7.3 8 7 5 0 6 1 0 5 0 0 1.909 0.286 0.412 0.464 0.876
Gordon Graceffo
R
 2 0 6.30 4 0 1 0 100.0% 10.0 10 8 7 1 1 0 0 7 2 0 1.100 0.244 0.262 0.439 0.701
Matthew Svanson
R
 0 0 3.18 4 0 0 0 0.0% 5.7 3 2 2 0 3 0 0 4 0 0 1.059 0.158 0.273 0.211 0.483
Erick Fedde
R
 2 3 4.78 7 0 0 0 0.0% 37.7 34 20 20 3 21 0 1 21 1 0 1.460 0.245 0.348 0.374 0.722
Miles Mikolas
R
 1 2 4.76 7 0 0 0 0.0% 34.0 34 19 18 1 12 0 2 18 0 0 1.353 0.256 0.327 0.353 0.680
Andre Pallante
R
 2 2 4.75 7 0 0 0 0.0% 36.0 39 19 19 6 16 0 0 21 2 0 1.528 0.275 0.348 0.465 0.813
Matthew Liberatore
L
 3 3 3.07 7 0 0 0 0.0% 41.0 33 15 14 2 6 0 0 38 1 0 0.951 0.214 0.244 0.305 0.549
Michael McGreevy
R
 1 0 0.00 1 0 0 0 0.0% 5.7 1 0 0 0 1 0 1 5 0 0 0.353 0.056 0.150 0.056 0.206
Drew Rom
L
 0 0 0.00 0 0 0 0 0.0% 0.0 0 0 0 0 0 0 0 0 0 0 0.000 0.000 0.000 0.000 0.000

2025 Advanced Pitching Stats in All Games

This table provides advanced pitching and Sabermetric statistics for the team's bullpen pitchers, highlighting expected availability for today's game. Metrics include ERA and advanced ERA estimators (xERA, FIP, SIERA), strikeout and walk rates, and performance with inherited runners, helping bettors and fantasy managers assess bullpen effectiveness. Pitchers in white rows are projected available for relief, while those in grey rows are either unavailable or designated as starters. Favorable (green) and unfavorable (red) performances are clearly marked for quick reference.

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 Pittsburgh Bullpen - 2025 All Games Advanced Pitching Statistics
  ERA Estimates Percentages and Ratios Inherited Runners
Player
T
 ERA xERA ERC FIP dERA DICE SIERA HR% Str% BB% BB9 SO% SO9 SOBB PFR LOB% GOFO IR IRA IRA%
Dennis Santana
R
 1.26 1.01 1.25 2.47 2.57 2.47 2.50 0.0% 71.8% 5.5% 1.9 16.4% 5.7 3.00 0.84 75.0% 1.07 4 1 25.0%
Caleb Ferguson
L
 4.50 3.19 3.37 3.47 3.72 3.48 3.28 0.0% 64.9% 9.9% 3.9 12.7% 5.1 1.29 1.00 65.2% 1.78 5 0 0.0%
Ryan Borucki
L
 3.07 1.07 1.28 2.15 2.28 2.15 1.96 0.0% 62.8% 7.0% 2.5 22.8% 8.0 3.25 1.16 53.8% 10.00 10 2 20.0%
David Bednar
R
 5.00 4.71 4.35 3.10 3.08 3.10 2.76 2.6% 65.5% 7.5% 3.0 27.5% 11.0 3.67 1.56 60.3% 4.00 0 0 0.0%
Colin Holderman
R
 8.18 7.71 9.11 7.46 7.08 7.46 7.53 5.9% 65.0% 12.5% 5.7 16.1% 7.4 1.29 1.45 69.1% 17.00 11 4 36.4%
Joey Wentz
L
 3.44 3.61 3.45 4.52 4.55 4.52 4.18 2.5% 62.7% 11.3% 4.4 18.8% 7.4 1.67 1.31 72.1% 1.70 9 6 66.7%
Chase Shugart
R
 3.68 3.30 2.74 4.19 4.13 4.19 4.15 3.4% 62.2% 6.7% 2.5 18.3% 6.8 2.75 1.02 75.8% 1.71 4 0 0.0%
Tim Mayza
L
 2.89 3.38 3.01 3.42 3.41 3.42 3.44 2.6% 67.9% 2.6% 1.0 20.5% 7.7 8.00 0.96 83.3% 3.00 8 2 25.0%
Justin Lawrence
R
 0.79 0.79 1.67 2.57 2.66 2.57 2.32 0.0% 57.6% 12.8% 4.8 31.9% 11.9 2.50 1.85 92.3% 5.00 2 1 50.0%
Tanner Rainey
R
 0.00 -2.89 0.00 -0.90 -0.98 -0.90 0.36 0.0% 75.0% 0.0% 0.0 66.7% 18.0 0.00 2.00 0.0% 0.00 0 0 0.0%
Dauri Moreta
R
 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0% 0.0% 0.0% 0.0 0.0% 0.0 0.00 0.00 0.0% 0.00 0 0 0.0%
Michael Burrows
R
 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0% 0.0% 0.0% 0.0 0.0% 0.0 0.00 0.00 0.0% 0.00 0 0 0.0%
Paul Skenes
R
 2.77 2.14 1.85 3.04 3.03 3.04 3.04 2.1% 64.3% 6.2% 2.2 24.4% 8.7 3.92 1.21 72.5% 2.25 0 0 0.0%
Bailey Falter
L
 5.06 4.04 3.72 4.65 4.63 4.65 4.65 4.1% 63.5% 7.0% 2.7 17.7% 6.8 2.55 1.04 55.9% 1.22 0 0 0.0%
Andrew Heaney
L
 3.18 2.94 2.76 3.83 3.85 3.83 3.83 2.5% 65.3% 7.9% 2.9 20.6% 7.7 2.62 1.18 79.2% 1.91 0 0 0.0%
Carmen Mlodzinski
R
 6.16 6.06 6.07 4.31 4.16 4.31 4.31 2.9% 63.2% 6.9% 2.9 16.7% 7.0 2.40 1.11 66.8% 2.06 0 0 0.0%
Johan Oviedo
R
 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0% 0.0% 0.0% 0.0 0.0% 0.0 0.00 0.00 0.0% 0.00 0 0 0.0%
Jared Jones
R
 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0% 0.0% 0.0% 0.0 0.0% 0.0 0.00 0.00 0.0% 0.00 0 0 0.0%

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 Saint Louis Bullpen - 2025 All Games Advanced Pitching Statistics
  ERA Estimates Percentages and Ratios Inherited Runners
Player
T
 ERA xERA ERC FIP dERA DICE SIERA HR% Str% BB% BB9 SO% SO9 SOBB PFR LOB% GOFO IR IRA IRA%
Ryan Helsley
R
 3.46 4.18 4.54 4.18 4.19 4.18 3.93 1.8% 65.4% 13.3% 5.5 21.7% 9.0 1.63 1.62 81.6% 3.00 0 0 0.0%
Phil Maton
R
 3.60 2.86 2.97 1.70 1.94 1.70 1.71 0.0% 65.9% 4.6% 1.8 27.7% 10.8 6.00 1.40 65.0% 2.00 5 2 40.0%
Steven Matz
L
 1.44 1.86 1.71 1.90 2.12 1.90 1.90 0.0% 67.8% 3.0% 1.1 21.0% 7.6 7.00 0.96 80.0% 1.16 0 0 0.0%
John King
L
 5.40 7.76 7.96 5.59 5.32 5.59 5.63 3.5% 65.4% 8.6% 3.9 10.3% 4.6 1.20 0.94 69.3% 10.50 11 5 45.5%
Kyle Leahy
R
 1.21 0.38 0.94 3.64 3.67 3.64 3.65 2.5% 65.7% 8.5% 2.8 23.2% 7.7 2.71 1.16 98.4% 4.00 7 2 28.6%
JoJo Romero
L
 5.73 4.06 4.03 5.01 5.24 5.01 4.49 2.3% 60.5% 16.0% 6.5 16.0% 6.5 1.00 1.45 57.7% 2.17 7 3 42.9%
Chris Roycroft
R
 6.14 4.94 5.04 4.19 4.34 4.19 3.79 0.0% 56.5% 16.7% 7.4 13.9% 6.1 0.83 1.50 50.0% 1.00 8 5 62.5%
Gordon Graceffo
R
 6.30 3.50 2.76 3.30 3.30 3.30 3.31 2.4% 69.3% 2.4% 0.9 17.1% 6.3 7.00 0.80 31.3% 4.67 2 2 100.0%
Matthew Svanson
R
 3.18 1.30 1.48 3.28 3.44 3.28 3.28 0.0% 58.3% 13.0% 4.8 17.4% 6.4 1.33 1.24 66.7% 1.50 1 0 0.0%
Erick Fedde
R
 4.78 3.99 4.05 4.77 4.88 4.77 4.77 1.9% 61.0% 12.4% 5.0 12.4% 5.0 1.00 1.12 69.5% 1.44 0 0 0.0%
Miles Mikolas
R
 4.76 3.56 3.48 3.66 3.77 3.66 3.66 0.7% 63.6% 8.0% 3.2 12.0% 4.8 1.50 0.88 62.2% 0.94 0 0 0.0%
Andre Pallante
R
 4.75 5.37 5.17 5.43 5.34 5.43 5.45 3.8% 57.7% 9.8% 4.0 12.9% 5.3 1.31 1.03 77.3% 8.25 0 0 0.0%
Matthew Liberatore
L
 3.07 2.15 1.79 2.32 2.43 2.32 2.32 1.3% 67.6% 3.7% 1.3 23.5% 8.3 6.33 1.07 66.3% 1.52 0 0 0.0%
Michael McGreevy
R
 0.00 -1.43 0.37 2.39 2.38 2.39 2.35 0.0% 62.5% 5.0% 1.6 25.0% 7.9 5.00 1.06 100.0% 1.67 3 0 0.0%
Drew Rom
L
 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0% 0.0% 0.0% 0.0 0.0% 0.0 0.00 0.00 0.0% 0.00 0 0 0.0%
Glossary of Terms

Player: The name of the bullpen pitcher.

T: The throwing hand of the pitcher (L for left-handed, R for right-handed).

W: The total number of wins credited to the pitcher.

L: The total number of losses credited to the pitcher.

ERA (Earned Run Average): The average number of earned runs allowed per nine innings pitched.

G (Games Played): The number of games in which the pitcher has appeared.

HLD (Holds): The number of times a relief pitcher maintains a lead before passing the game to another reliever.

SV (Saves): The number of times a pitcher successfully finishes a game with a lead.

BSV (Blown Saves): The number of times a pitcher enters in a save situation and fails to maintain the lead.

SV% (Save Percentage): The percentage of save opportunities successfully converted.

IP (Innings Pitched): The total number of innings pitched by the player.

H (Hits Allowed): The total number of hits allowed by the pitcher.

R (Runs Allowed): The total number of runs allowed, including earned and unearned runs.

ER (Earned Runs): The total number of runs scored against the pitcher that were not the result of defensive errors.

HR (Home Runs Allowed): The total number of home runs given up by the pitcher.

BB (Walks): The total number of batters walked by the pitcher.

IBB (Intentional Walks): The number of walks that were intentionally issued.

HBP (Hit by Pitch): The number of batters hit by a pitch.

SO (Strikeouts): The number of batters struck out by the pitcher.

WP (Wild Pitches): The number of pitches that the catcher fails to catch, allowing runners to advance.

BK (Balks): The number of illegal pitching movements that allow runners to advance.

WHIP (Walks + Hits per Inning Pitched): The average number of walks and hits allowed per inning pitched.

AVGa (Opponent Batting Average): The batting average of opposing hitters against the pitcher.

OBPa (Opponent On-Base Percentage): The on-base percentage of opposing hitters against the pitcher.

SLGa (Opponent Slugging Percentage): The slugging percentage of opposing hitters against the pitcher.

OPSa (Opponent On-Base Plus Slugging): The on-base plus slugging percentage of opposing hitters against the pitcher.

ERA (Earned Run Average): The average number of earned runs a pitcher allows per nine innings.

xERA (Expected ERA): A predictive measure of ERA based on batted-ball data, strikeouts, and walks.

ERC (Component ERA): An estimate of ERA based on hits, walks, and home runs allowed.

FIP (Fielding Independent Pitching): A metric that evaluates a pitcher's effectiveness independent of fielding by focusing on strikeouts, walks, and home runs allowed.

dERA (Defense-Independent ERA): An alternative ERA metric that removes the effect of defense and focuses on pitching outcomes.

DICE (Defense-Independent Component ERA): A similar stat to FIP that adjusts for defense-independent outcomes.

SIERA (Skill-Interactive ERA): A sabermetric pitching stat that evaluates a pitcher's overall skill by considering how batted balls are put in play.

Pitching Ratios & Percentages

Str% (Strike Percentage): The percentage of total pitches thrown for strikes.

BB% (Walk Percentage): The percentage of batters faced who are walked.

BB9 (Walks per 9 Innings): The average number of walks allowed per nine innings.

SO% (Strikeout Percentage): The percentage of batters faced who are struck out.

SO9 (Strikeouts per 9 Innings): The average number of strikeouts per nine innings.

SO/BB (Strikeout-to-Walk Ratio): The ratio of strikeouts to walks, indicating control and command.

PFR (Power-Finesse Ratio): A measure of a pitcher’s ability to generate strikeouts while limiting walks.

LOB% (Left on Base Percentage): The percentage of baserunners left stranded by a pitcher.

GO/FO (Ground Out to Fly Out Ratio): A measure of a pitcher's tendency to induce ground balls compared to fly balls.

Pitching Performance Indicators

Dom (Dominant Starts): The number of starts classified as dominant based on low runs allowed and high strikeout rates.

Dom% (Dominant Start Percentage): The percentage of total starts that were dominant performances.

Dis (Disaster Starts): The number of starts where the pitcher performed poorly, allowing a high number of runs.

Dis% (Disaster Start Percentage): The percentage of total starts that were considered disasters.

Inherited Runners

IR (Inherited Runners): The number of runners already on base when the pitcher enters the game.

IRA (Inherited Runners Allowed): The number of inherited runners that the pitcher allows to score.

IRA% (Inherited Runner Scoring Percentage): The percentage of inherited runners that end up scoring.