Since 1980, 5 pitchers are tied for winning the most games by a relief pitcher in a season, with 14 wins. The first three are Ryan Yarbrough in 2018 and Roger McDowell and Mark Eichhorn in 1986.
| NAME | W | SEASON | TM | L | W% | G | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | H/9 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | R. Yarbrough | 14 | 2018 | 4 | .778 | 32 | 0 | 3.72 | 106 | 0 | 0 | 0 | 118.2 | 110 | 49 | 52 | 15 | 42 | 6 | 3 | 5 | 505 | 0 | 8.04 | 3.19 | 2.52 | 1.14 | 21.0 | 8.3 | 1.28 | .283 | 3.94 | 8.34 | |
| 2 | | R. McDowell | 14 | 1986 | 9 | .609 | 75 | 0 | 3.02 | 65 | 0 | 0 | 22 | 128.0 | 107 | 43 | 48 | 4 | 42 | 3 | 52 | 5 | 524 | 3 | 4.57 | 2.95 | 1.55 | 0.28 | 12.4 | 8.0 | 1.16 | .251 | 3.38 | 7.52 | |
| 3 | | M. Eichhorn | 14 | 1986 | 6 | .700 | 69 | 0 | 1.72 | 166 | 0 | 0 | 10 | 157.0 | 105 | 30 | 32 | 8 | 45 | 7 | 38 | 14 | 612 | 2 | 9.52 | 2.58 | 3.69 | 0.46 | 27.1 | 7.4 | 0.96 | .251 | 1.83 | 6.02 | |
| 4 | | J. Slaton | 14 | 1983 | 6 | .700 | 46 | 0 | 4.33 | 38 | 0 | 0 | 5 | 112.1 | 112 | 54 | 57 | 12 | 56 | 3 | 26 | 5 | 490 | 3 | 3.04 | 4.49 | 0.68 | 0.96 | 7.8 | 11.4 | 1.50 | .262 | 4.57 | 8.97 | |
| 5 | | M. Clear | 14 | 1982 | 9 | .609 | 55 | 0 | 3.00 | 109 | 0 | 0 | 14 | 105.0 | 92 | 35 | 39 | 11 | 61 | 7 | 44 | 6 | 467 | 1 | 9.34 | 5.23 | 1.79 | 0.94 | 23.3 | 13.1 | 1.46 | .290 | 3.34 | 7.89 | |
| 6 | | A. Ashby | 13 | 2026 | 3 | .813 | 68 | 0 | 3.12 | 105 | 0 | 0 | 2 | 78.0 | 68 | 27 | 32 | 7 | 39 | 2 | 8 | 1 | 339 | 8 | 12.12 | 4.50 | 2.69 | 0.81 | 31.0 | 11.5 | 1.37 | .328 | 3.69 | 7.85 | |
| 7 | | A. Morejon | 13 | 2025 | 6 | .684 | 75 | 0 | 2.08 | 70 | 0 | 0 | 3 | 73.2 | 49 | 17 | 23 | 2 | 17 | 0 | 9 | 3 | 286 | 2 | 8.55 | 2.08 | 4.12 | 0.24 | 24.5 | 5.9 | 0.90 | .239 | 2.81 | 5.99 | |
| 8 | | J. Orosco | 13 | 1983 | 7 | .650 | 62 | 0 | 1.47 | 84 | 0 | 0 | 17 | 110.0 | 76 | 18 | 27 | 3 | 38 | 1 | 42 | 7 | 432 | 1 | 6.87 | 3.11 | 2.21 | 0.25 | 19.4 | 8.8 | 1.04 | .239 | 2.21 | 6.22 | |
| 9 | | R. Gossage | 13 | 1983 | 5 | .722 | 57 | 0 | 2.27 | 90 | 0 | 0 | 22 | 87.1 | 82 | 22 | 27 | 5 | 25 | 1 | 47 | 5 | 367 | 0 | 9.27 | 2.58 | 3.60 | 0.52 | 24.5 | 6.8 | 1.23 | .313 | 2.78 | 8.45 | |
| 10 | | A. Lopez | 13 | 1980 | 5 | .722 | 66 | 0 | 3.46 | 95 | 0 | 0 | 21 | 119.2 | 120 | 46 | 50 | 11 | 42 | 3 | 59 | 5 | 513 | 6 | 7.14 | 3.16 | 2.26 | 0.83 | 18.5 | 8.2 | 1.35 | .301 | 3.76 | 9.03 | |
| 11 | | C. Poche | 12 | 2023 | 3 | .800 | 66 | 0 | 2.23 | 61 | 0 | 0 | 1 | 60.2 | 42 | 15 | 17 | 4 | 24 | 1 | 6 | 1 | 246 | 3 | 9.05 | 3.56 | 2.54 | 0.59 | 24.8 | 9.8 | 1.09 | .244 | 2.52 | 6.23 | |
| 12 | | B. Suter | 12 | 2021 | 4 | .750 | 60 | 0 | 2.79 | 67 | 0 | 0 | 1 | 71.0 | 68 | 22 | 31 | 9 | 23 | 1 | 9 | 3 | 301 | 1 | 8.49 | 2.92 | 2.91 | 1.14 | 22.3 | 7.6 | 1.28 | .294 | 3.93 | 8.62 | |
| 13 | | J. Crain | 12 | 2005 | 5 | .706 | 75 | 0 | 2.71 | 25 | 0 | 0 | 1 | 79.2 | 61 | 24 | 28 | 6 | 29 | 5 | 17 | 7 | 326 | 2 | 2.82 | 3.28 | 0.86 | 0.68 | 7.7 | 8.9 | 1.13 | .211 | 3.16 | 6.89 | |
| 14 | | J. Nathan | 12 | 2003 | 4 | .750 | 78 | 0 | 2.96 | 83 | 0 | 0 | 0 | 79.0 | 51 | 26 | 26 | 7 | 33 | 3 | 9 | 3 | 316 | 4 | 9.46 | 3.76 | 2.52 | 0.80 | 26.3 | 10.4 | 1.06 | .232 | 2.96 | 5.81 | |
| 15 | | S. Williamson | 12 | 1999 | 7 | .632 | 62 | 0 | 2.41 | 107 | 0 | 0 | 19 | 93.1 | 54 | 25 | 29 | 8 | 43 | 1 | 40 | 6 | 366 | 13 | 10.32 | 4.15 | 2.49 | 0.77 | 29.2 | 11.7 | 1.04 | .222 | 2.80 | 5.21 | |
| 16 | | M. Williams | 12 | 1991 | 5 | .706 | 69 | 0 | 2.34 | 84 | 0 | 0 | 30 | 88.1 | 56 | 23 | 24 | 4 | 62 | 8 | 60 | 5 | 386 | 4 | 8.56 | 6.32 | 1.35 | 0.41 | 21.8 | 16.1 | 1.34 | .228 | 2.45 | 5.71 | |
| 17 | | J. Parrett | 12 | 1989 | 6 | .667 | 72 | 0 | 2.98 | 98 | 0 | 0 | 6 | 105.2 | 90 | 35 | 43 | 6 | 44 | 0 | 34 | 13 | 444 | 7 | 8.35 | 3.75 | 2.23 | 0.51 | 22.1 | 9.9 | 1.27 | .284 | 3.66 | 7.67 | |
| 18 | | J. Parrett | 12 | 1988 | 4 | .750 | 61 | 0 | 2.65 | 62 | 0 | 0 | 6 | 91.2 | 66 | 27 | 29 | 8 | 45 | 1 | 34 | 9 | 369 | 4 | 6.09 | 4.42 | 1.38 | 0.79 | 16.8 | 12.2 | 1.21 | .229 | 2.85 | 6.48 | |
| 19 | | J. Musselman | 12 | 1987 | 5 | .706 | 67 | 0 | 4.27 | 53 | 0 | 0 | 3 | 84.1 | 72 | 40 | 42 | 7 | 53 | 3 | 14 | 12 | 363 | 5 | 5.66 | 5.66 | 1.00 | 0.75 | 14.6 | 14.6 | 1.48 | .263 | 4.48 | 7.68 | |
| 20 | | J. Franco | 12 | 1985 | 3 | .800 | 67 | 0 | 2.18 | 61 | 0 | 0 | 12 | 99.0 | 83 | 24 | 27 | 5 | 40 | 1 | 33 | 8 | 407 | 4 | 5.55 | 3.64 | 1.53 | 0.45 | 15.0 | 9.8 | 1.24 | .260 | 2.45 | 7.55 | |
| 21 | | D. Righetti | 12 | 1985 | 7 | .632 | 74 | 0 | 2.78 | 92 | 0 | 0 | 29 | 107.0 | 96 | 33 | 36 | 5 | 45 | 0 | 60 | 3 | 452 | 7 | 7.74 | 3.79 | 2.04 | 0.42 | 20.4 | 10.0 | 1.32 | .294 | 3.03 | 8.07 | |
| 22 | | D. Spillner | 12 | 1982 | 10 | .545 | 65 | 0 | 2.49 | 90 | 0 | 0 | 21 | 133.2 | 117 | 37 | 44 | 9 | 45 | 0 | 54 | 7 | 557 | 5 | 6.06 | 3.03 | 2.00 | 0.61 | 16.2 | 8.1 | 1.21 | .262 | 2.96 | 7.88 | |
| 23 | | K. Tekulve | 12 | 1982 | 8 | .600 | 85 | 0 | 2.87 | 66 | 0 | 0 | 20 | 128.2 | 113 | 41 | 47 | 7 | 46 | 3 | 64 | 23 | 541 | 1 | 4.62 | 3.22 | 1.43 | 0.49 | 12.2 | 8.5 | 1.24 | .253 | 3.29 | 7.90 | |
| 24 | | B. Stanley | 12 | 1982 | 7 | .632 | 48 | 0 | 3.10 | 83 | 0 | 0 | 14 | 168.1 | 161 | 58 | 60 | 11 | 50 | 4 | 33 | 6 | 694 | 2 | 4.44 | 2.67 | 1.66 | 0.59 | 12.0 | 7.2 | 1.25 | .275 | 3.21 | 8.61 | |
| 25 | | B. Caudill | 12 | 1982 | 9 | .571 | 70 | 0 | 2.35 | 111 | 0 | 0 | 26 | 95.2 | 65 | 25 | 25 | 9 | 35 | 1 | 64 | 4 | 380 | 2 | 10.44 | 3.29 | 3.17 | 0.85 | 29.2 | 9.2 | 1.05 | .250 | 2.35 | 6.11 | |
NYM
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MIL
BOS
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MIN
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SEAStatMuse has game-level data for pitcher wins going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
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| NL East | W | L | PCT | GB |
|---|---|---|---|---|
87 | 61 | .588 | ||
82 | 66 | .554 | 5.0 | |
72 | 76 | .486 | 15.0 | |
68 | 79 | .463 | 18.5 | |
68 | 81 | .456 | 19.5 | |
| NL Central | W | L | PCT | GB |
 Brewers - x | 92 | 56 | .622 | |
82 | 66 | .554 | 10.0 | |
74 | 74 | .500 | 18.0 | |
73 | 75 | .493 | 19.0 | |
69 | 78 | .469 | 22.5 | |
| NL West | W | L | PCT | GB |
90 | 57 | .612 | ||
79 | 68 | .537 | 11.0 | |
79 | 69 | .534 | 11.5 | |
62 | 86 | .419 | 28.5 | |
55 | 92 | .374 | 35.0 |
Braves
Phillies
Marlins
Nationals
Cubs
Cardinals
Dodgers
Diamondbacks
Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
 Rays - x | 88 | 59 | .599 | |
85 | 62 | .578 | 3.0 | |
80 | 68 | .541 | 8.5 | |
73 | 75 | .493 | 15.5 | |
72 | 76 | .486 | 16.5 | |
| AL Central | W | L | PCT | GB |
75 | 72 | .510 | ||
75 | 73 | .507 | 0.5 | |
69 | 78 | .469 | 6.0 | |
68 | 79 | .463 | 7.0 | |
66 | 82 | .446 | 9.5 | |
| AL West | W | L | PCT | GB |
75 | 73 | .507 | ||
72 | 76 | .486 | 3.0 | |
69 | 79 | .466 | 6.0 | |
60 | 88 | .405 | 15.0 | |
56 | 91 | .381 | 18.5 |
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Twins
Royals
Rangers
Mariners
Angels