50 pitchers are tied for the highest win percentage by a relief pitcher in a season, at 1.000 this season. The first three are Braxton Garrett, Jackson Kent and Julian Aguiar.
| NAME | W% | SEASON | TM | W | L | 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 |  | B. Garrett | 1.000 | 2026 | 1 | 0 | 1 | 0 | 1.80 | 2 | 0 | 0 | 0 | 5.0 | 4 | 1 | 1 | 0 | 3 | 1 | 0 | 0 | 21 | 0 | 3.60 | 5.40 | 0.67 | 0.00 | 9.5 | 14.3 | 1.40 | .267 | 1.80 | 7.20 | |
| 2 | | J. Kent | 1.000 | 2026 | 1 | 0 | 1 | 0 | 2.25 | 3 | 0 | 0 | 0 | 4.0 | 6 | 1 | 1 | 0 | 2 | 0 | 0 | 0 | 19 | 2 | 6.75 | 4.50 | 1.50 | 0.00 | 15.8 | 10.5 | 2.00 | .429 | 2.25 | 13.50 | |
| 3 | | J. Aguiar | 1.000 | 2026 | 1 | 0 | 1 | 0 | 6.00 | 2 | 0 | 0 | 0 | 3.0 | 4 | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 14 | 0 | 6.00 | 3.00 | 2.00 | 0.00 | 14.3 | 7.1 | 1.67 | .364 | 6.00 | 12.00 | |
| 4 |  | K. Bubic | 1.000 | 2026 | 1 | 0 | 5 | 0 | 0.00 | 5 | 0 | 0 | 0 | 4.2 | 4 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 19 | 0 | 9.64 | 0.00 | 0.00 | 26.3 | 0.0 | 0.86 | .308 | 0.00 | 7.71 | ||
| 5 | | J. Cantillo | 1.000 | 2026 | 2 | 0 | 3 | 0 | 0.00 | 17 | 0 | 0 | 0 | 15.0 | 5 | 0 | 0 | 0 | 4 | 1 | 0 | 0 | 53 | 1 | 10.20 | 2.40 | 4.25 | 0.00 | 32.1 | 7.5 | 0.60 | .161 | 0.00 | 3.00 | |
| 6 | | K. Harrison | 1.000 | 2026 | 1 | 0 | 4 | 0 | 13.50 | 5 | 0 | 0 | 0 | 3.1 | 8 | 5 | 5 | 0 | 1 | 1 | 0 | 0 | 20 | 0 | 13.50 | 2.70 | 5.00 | 0.00 | 25.0 | 5.0 | 2.70 | .615 | 13.50 | 21.60 | |
| 7 | | E. Pecko | 1.000 | 2026 | 1 | 0 | 3 | 0 | 1.26 | 10 | 0 | 0 | 0 | 14.1 | 5 | 2 | 2 | 1 | 2 | 1 | 0 | 0 | 49 | 0 | 6.28 | 1.26 | 5.00 | 0.63 | 20.4 | 4.1 | 0.49 | .114 | 1.26 | 3.14 | |
| 8 | | M. Wilkinson | 1.000 | 2026 | 1 | 0 | 2 | 0 | 0.00 | 4 | 0 | 0 | 0 | 5.0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 17 | 0 | 7.20 | 0.00 | 0.00 | 23.5 | 0.0 | 0.40 | .154 | 0.00 | 3.60 | ||
| 9 | | B. Miller | 1.000 | 2026 | 1 | 0 | 3 | 0 | 3.68 | 8 | 0 | 0 | 0 | 7.1 | 5 | 3 | 3 | 1 | 4 | 3 | 0 | 1 | 33 | 1 | 9.82 | 4.91 | 2.00 | 1.23 | 24.2 | 12.1 | 1.23 | .235 | 3.68 | 6.14 | |
| 10 | | C. Hjerpe | 1.000 | 2026 | 1 | 0 | 4 | 0 | 4.38 | 15 | 0 | 0 | 0 | 12.1 | 7 | 6 | 6 | 0 | 9 | 2 | 0 | 0 | 55 | 0 | 10.95 | 6.57 | 1.67 | 0.00 | 27.3 | 16.4 | 1.30 | .241 | 4.38 | 5.11 | |
| 11 | | J. Sinclair | 1.000 | 2026 | 1 | 0 | 11 | 0 | 2.45 | 8 | 0 | 0 | 1 | 11.0 | 6 | 3 | 3 | 0 | 4 | 3 | 5 | 0 | 46 | 0 | 6.55 | 3.27 | 2.00 | 0.00 | 17.4 | 8.7 | 0.91 | .194 | 2.45 | 4.91 | |
| 12 | | B. Walston | 1.000 | 2026 | 1 | 0 | 2 | 0 | 3.00 | 2 | 0 | 0 | 0 | 3.0 | 1 | 1 | 2 | 0 | 3 | 0 | 2 | 2 | 13 | 1 | 6.00 | 9.00 | 0.67 | 0.00 | 15.4 | 23.1 | 1.33 | .125 | 6.00 | 3.00 | |
| 13 | | C. Prielipp | 1.000 | 2026 | 1 | 0 | 2 | 0 | 2.00 | 10 | 0 | 0 | 0 | 9.0 | 8 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 37 | 0 | 10.00 | 1.00 | 10.00 | 1.00 | 27.0 | 2.7 | 1.00 | .292 | 2.00 | 8.00 | |
| 14 | | J. Simpson | 1.000 | 2026 | 1 | 0 | 3 | 0 | 6.75 | 4 | 0 | 0 | 0 | 4.0 | 0 | 3 | 3 | 0 | 3 | 0 | 0 | 0 | 14 | 1 | 9.00 | 6.75 | 1.33 | 0.00 | 28.6 | 21.4 | 0.75 | .000 | 6.75 | 0.00 | |
| 15 | | C. Winquest | 1.000 | 2026 | 1 | 0 | 11 | 0 | 3.95 | 16 | 0 | 0 | 0 | 13.2 | 9 | 6 | 8 | 1 | 8 | 1 | 6 | 0 | 57 | 1 | 10.54 | 5.27 | 2.00 | 0.66 | 28.1 | 14.0 | 1.24 | .258 | 5.27 | 5.93 | |
| 16 | | R. Gasser | 1.000 | 2026 | 1 | 0 | 1 | 0 | 1.69 | 6 | 0 | 0 | 0 | 5.1 | 6 | 1 | 1 | 0 | 2 | 0 | 0 | 0 | 24 | 0 | 10.13 | 3.38 | 3.00 | 0.00 | 25.0 | 8.3 | 1.50 | .375 | 1.69 | 10.13 | |
| 17 | | C. Vargas | 1.000 | 2026 | 3 | 0 | 16 | 0 | 4.74 | 17 | 0 | 0 | 0 | 19.0 | 16 | 10 | 10 | 2 | 4 | 4 | 4 | 0 | 81 | 1 | 8.05 | 1.89 | 4.25 | 0.95 | 21.0 | 4.9 | 1.05 | .259 | 4.74 | 7.58 | |
| 18 | | C. Duran | 1.000 | 2026 | 1 | 0 | 2 | 0 | 13.50 | 1 | 0 | 0 | 0 | 1.1 | 2 | 2 | 2 | 0 | 3 | 0 | 1 | 0 | 9 | 1 | 6.75 | 20.25 | 0.33 | 0.00 | 11.1 | 33.3 | 3.75 | .400 | 13.50 | 13.50 | |
| 19 | | W. Olds | 1.000 | 2026 | 2 | 0 | 14 | 0 | 1.15 | 20 | 0 | 0 | 0 | 15.2 | 11 | 2 | 5 | 2 | 8 | 2 | 6 | 0 | 68 | 2 | 11.49 | 4.60 | 2.50 | 1.15 | 29.4 | 11.8 | 1.21 | .250 | 2.87 | 6.32 | |
| 20 | | B. Hanner | 1.000 | 2026 | 1 | 0 | 5 | 0 | 8.59 | 7 | 0 | 0 | 0 | 7.1 | 11 | 7 | 7 | 4 | 1 | 0 | 4 | 0 | 34 | 1 | 8.59 | 1.23 | 7.00 | 4.91 | 20.6 | 2.9 | 1.64 | .318 | 8.59 | 13.50 | |
| 21 | | J. Montgomery | 1.000 | 2026 | 1 | 0 | 13 | 0 | 4.15 | 20 | 0 | 0 | 1 | 26.0 | 20 | 12 | 12 | 3 | 6 | 1 | 5 | 1 | 104 | 0 | 6.92 | 2.08 | 3.33 | 1.04 | 19.2 | 5.8 | 1.00 | .230 | 4.15 | 6.92 | |
| 22 | | P. Mushinski | 1.000 | 2026 | 1 | 0 | 8 | 0 | 2.70 | 0 | 0 | 0 | 0 | 6.2 | 9 | 2 | 2 | 0 | 5 | 0 | 1 | 0 | 34 | 1 | 0.00 | 6.75 | 0.00 | 0.00 | 0.0 | 14.7 | 2.10 | .310 | 2.70 | 12.15 | |
| 23 | | S. Cecconi | 1.000 | 2026 | 1 | 0 | 7 | 0 | 5.93 | 15 | 0 | 0 | 0 | 13.2 | 11 | 9 | 9 | 3 | 4 | 0 | 2 | 0 | 55 | 1 | 9.88 | 2.63 | 3.75 | 1.98 | 27.3 | 7.3 | 1.10 | .242 | 5.93 | 7.24 | |
| 24 | | N. Lavender | 1.000 | 2026 | 1 | 0 | 21 | 0 | 1.66 | 26 | 0 | 0 | 0 | 21.2 | 12 | 4 | 4 | 1 | 4 | 0 | 1 | 0 | 79 | 0 | 10.80 | 1.66 | 6.50 | 0.42 | 32.9 | 5.1 | 0.74 | .229 | 1.66 | 4.98 | |
| 25 | | T. Williams | 1.000 | 2026 | TOT | 2 | 0 | 14 | 0 | 3.25 | 32 | 0 | 0 | 0 | 27.2 | 24 | 10 | 10 | 4 | 10 | 2 | 8 | 0 | 117 | 0 | 10.41 | 3.25 | 3.20 | 1.30 | 27.4 | 8.5 | 1.23 | .290 | 3.25 | 7.81 |
WSH
CIN
SFG
STL
AZ
MIN
SEA
KCR
TEX
COL
NYMStatMuse has game-level data for pitcher win percentage going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
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MLB 2026 Standings
| NL East | W | L | PCT | GB |
|---|---|---|---|---|
 Braves - y | 94 | 68 | .580 | |
 Phillies - w | 88 | 74 | .543 | 6.0 |
80 | 82 | .494 | 14.0 | |
77 | 85 | .475 | 17.0 | |
74 | 88 | .457 | 20.0 | |
| NL Central | W | L | PCT | GB |
 Brewers - y | 103 | 59 | .636 | |
 Cubs - w | 89 | 73 | .549 | 14.0 |
82 | 80 | .506 | 21.0 | |
77 | 85 | .475 | 26.0 | |
75 | 87 | .463 | 28.0 | |
| NL West | W | L | PCT | GB |
 Dodgers - y | 100 | 62 | .617 | |
 Padres - w | 91 | 71 | .562 | 9.0 |
86 | 76 | .531 | 14.0 | |
65 | 97 | .401 | 35.0 | |
58 | 104 | .358 | 42.0 |
Marlins| AL East | W | L | PCT | GB |
|---|---|---|---|---|
 Rays - y | 98 | 64 | .605 | |
 Yankees - w | 93 | 68 | .578 | 4.5 |
 Red Sox - w | 87 | 75 | .537 | 11.0 |
79 | 82 | .491 | 18.5 | |
79 | 83 | .488 | 19.0 | |
| AL Central | W | L | PCT | GB |
 Guardians - y | 85 | 77 | .525 | |
 White Sox - w | 84 | 78 | .519 | 1.0 |
77 | 85 | .475 | 8.0 | |
76 | 86 | .469 | 9.0 | |
69 | 93 | .426 | 16.0 | |
| AL West | W | L | PCT | GB |
 Astros - y | 81 | 81 | .500 | |
80 | 82 | .494 | 1.0 | |
76 | 86 | .469 | 5.0 | |
64 | 98 | .395 | 17.0 | |
62 | 100 | .383 | 19.0 |
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