Mason Miller had the highest K/9 by a relief pitcher with 30.0+ innings pitched in 2025, with 15.18 per nine innings.
| NAME | K/9 | IP | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | H/9 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | M. Miller | 15.18 | 61.2 | 2025 | TOT | 60 | 1 | 2 | .333 | 0 | 2.63 | 104 | 0 | 0 | 22 | 28 | 18 | 19 | 5 | 28 | 1 | 37 | 2 | 234 | 3 | 4.09 | 3.71 | 0.73 | 44.4 | 12.0 | 0.91 | .240 | 2.77 | 4.09 |
| 2 |  | G. Jax | 13.64 | 64.0 | 2025 | TOT | 71 | 1 | 7 | .125 | 0 | 4.36 | 97 | 0 | 0 | 0 | 61 | 31 | 33 | 7 | 20 | 1 | 6 | 3 | 274 | 0 | 2.81 | 4.85 | 0.98 | 35.4 | 7.3 | 1.27 | .362 | 4.64 | 8.58 |
| 3 | | F. Cruz | 13.50 | 48.0 | 2025 | 49 | 3 | 4 | .429 | 0 | 3.56 | 72 | 0 | 0 | 2 | 33 | 19 | 21 | 5 | 24 | 3 | 4 | 0 | 200 | 5 | 4.50 | 3.00 | 0.94 | 36.0 | 12.0 | 1.19 | .292 | 3.94 | 6.19 | |
| 4 | | J. Estrada | 13.32 | 73.0 | 2025 | 77 | 4 | 5 | .444 | 0 | 3.45 | 108 | 0 | 0 | 3 | 58 | 28 | 31 | 12 | 27 | 3 | 7 | 2 | 304 | 3 | 3.33 | 4.00 | 1.48 | 35.5 | 8.9 | 1.16 | .299 | 3.82 | 7.15 | |
| 5 | | B. Abreu | 13.31 | 71.0 | 2025 | 70 | 3 | 4 | .429 | 0 | 2.28 | 105 | 0 | 0 | 7 | 51 | 18 | 18 | 4 | 31 | 4 | 19 | 0 | 296 | 4 | 3.93 | 3.39 | 0.51 | 35.5 | 10.5 | 1.15 | .309 | 2.28 | 6.46 | |
| 6 |  | E. DÃaz | 13.30 | 66.1 | 2025 | 62 | 6 | 3 | .667 | 0 | 1.63 | 98 | 0 | 0 | 28 | 37 | 12 | 14 | 4 | 21 | 8 | 48 | 0 | 258 | 7 | 2.85 | 4.67 | 0.54 | 38.0 | 8.1 | 0.87 | .260 | 1.90 | 5.02 | |
| 7 | | G. Taylor | 13.24 | 34.2 | 2025 | 34 | 2 | 3 | .400 | 0 | 4.67 | 51 | 0 | 0 | 6 | 35 | 18 | 18 | 0 | 14 | 0 | 10 | 1 | 148 | 5 | 3.63 | 3.64 | 0.00 | 34.5 | 9.5 | 1.41 | .422 | 4.67 | 9.09 | |
| 8 | | D. Williams | 13.06 | 62.0 | 2025 | 67 | 4 | 6 | .400 | 0 | 4.79 | 90 | 0 | 0 | 18 | 45 | 33 | 37 | 5 | 25 | 4 | 29 | 1 | 259 | 4 | 3.63 | 3.60 | 0.73 | 34.7 | 9.7 | 1.13 | .296 | 5.37 | 6.53 | |
| 9 |  | J. Hader | 12.99 | 52.2 | 2025 | 48 | 6 | 2 | .750 | 0 | 2.05 | 76 | 0 | 0 | 28 | 29 | 12 | 16 | 8 | 16 | 2 | 41 | 1 | 206 | 2 | 2.73 | 4.75 | 1.37 | 36.9 | 7.8 | 0.85 | .202 | 2.73 | 4.96 | |
| 10 | | F. Bautista | 12.98 | 34.2 | 2025 | 35 | 1 | 1 | .500 | 0 | 2.60 | 50 | 0 | 0 | 19 | 16 | 10 | 10 | 3 | 23 | 0 | 28 | 0 | 142 | 1 | 5.97 | 2.17 | 0.78 | 35.2 | 16.2 | 1.13 | .197 | 2.60 | 4.15 | |
| 11 |  | C. Smith | 12.71 | 73.2 | 2025 | 76 | 8 | 5 | .615 | 0 | 2.93 | 104 | 0 | 0 | 16 | 55 | 24 | 31 | 4 | 19 | 4 | 30 | 3 | 300 | 3 | 2.32 | 5.47 | 0.49 | 34.7 | 6.3 | 1.00 | .302 | 3.79 | 6.72 | |
| 12 |  | A. Chapman | 12.47 | 61.1 | 2025 | 67 | 5 | 3 | .625 | 0 | 1.17 | 85 | 0 | 0 | 32 | 28 | 8 | 9 | 3 | 15 | 0 | 43 | 0 | 228 | 6 | 2.20 | 5.67 | 0.44 | 37.3 | 6.6 | 0.70 | .200 | 1.32 | 4.11 | |
| 13 | | D. Bednar | 12.35 | 62.2 | 2025 | TOT | 64 | 6 | 5 | .545 | 0 | 2.30 | 86 | 0 | 0 | 27 | 46 | 16 | 18 | 4 | 19 | 1 | 51 | 2 | 251 | 4 | 2.73 | 4.53 | 0.57 | 34.3 | 7.6 | 1.04 | .298 | 2.59 | 6.61 |
| 14 | | M. Montgomery | 12.33 | 46.0 | 2025 | 57 | 1 | 3 | .250 | 0 | 5.67 | 63 | 0 | 0 | 1 | 49 | 29 | 32 | 6 | 27 | 1 | 11 | 0 | 209 | 1 | 5.28 | 2.33 | 1.17 | 30.1 | 12.9 | 1.65 | .384 | 6.26 | 9.59 | |
| 15 | | E. Uceta | 12.20 | 76.0 | 2025 | 70 | 10 | 3 | .769 | 0 | 3.79 | 103 | 0 | 0 | 1 | 62 | 32 | 33 | 11 | 27 | 8 | 11 | 3 | 321 | 0 | 3.20 | 3.81 | 1.30 | 32.1 | 8.4 | 1.17 | .297 | 3.91 | 7.34 | |
| 16 | | Y. RamÃrez | 12.15 | 33.1 | 2025 | 24 | 3 | 3 | .500 | 0 | 5.40 | 45 | 0 | 0 | 0 | 33 | 20 | 25 | 4 | 16 | 4 | 5 | 1 | 155 | 4 | 4.32 | 2.81 | 1.08 | 29.0 | 10.3 | 1.47 | .337 | 6.75 | 8.91 | |
| 17 | | R. Henriquez | 12.08 | 73.0 | 2025 | 69 | 7 | 1 | .875 | 0 | 2.22 | 98 | 0 | 0 | 7 | 53 | 18 | 23 | 8 | 27 | 4 | 9 | 2 | 303 | 2 | 3.33 | 3.63 | 0.99 | 32.3 | 8.9 | 1.10 | .271 | 2.84 | 6.53 | |
| 18 | | A. Vesia | 12.07 | 59.2 | 2025 | 68 | 4 | 2 | .667 | 0 | 3.02 | 80 | 0 | 0 | 5 | 37 | 20 | 21 | 9 | 22 | 5 | 11 | 3 | 237 | 3 | 3.32 | 3.64 | 1.36 | 33.8 | 9.3 | 0.99 | .231 | 3.17 | 5.58 | |
| 19 | | G. Cleavinger | 12.03 | 61.1 | 2025 | 67 | 2 | 6 | .250 | 0 | 2.35 | 82 | 0 | 0 | 2 | 40 | 16 | 17 | 9 | 18 | 7 | 9 | 0 | 243 | 1 | 2.64 | 4.56 | 1.32 | 33.7 | 7.4 | 0.95 | .244 | 2.49 | 5.87 | |
| 20 | | B. Little | 11.99 | 68.1 | 2025 | 79 | 4 | 2 | .667 | 0 | 3.03 | 91 | 0 | 0 | 1 | 48 | 23 | 28 | 2 | 45 | 2 | 4 | 4 | 295 | 7 | 5.93 | 2.02 | 0.26 | 30.8 | 15.3 | 1.36 | .297 | 3.69 | 6.32 | |
| 21 |  | A. Muñoz | 11.98 | 62.1 | 2025 | 64 | 3 | 3 | .500 | 0 | 1.73 | 83 | 0 | 0 | 38 | 36 | 12 | 18 | 2 | 28 | 4 | 47 | 3 | 254 | 7 | 4.04 | 2.96 | 0.29 | 32.7 | 11.0 | 1.03 | .248 | 2.60 | 5.20 | |
| 22 | | G. Speier | 11.90 | 62.0 | 2025 | 76 | 4 | 3 | .571 | 0 | 2.61 | 82 | 0 | 0 | 0 | 43 | 18 | 19 | 5 | 11 | 5 | 4 | 1 | 243 | 1 | 1.60 | 7.45 | 0.73 | 33.7 | 4.5 | 0.87 | .271 | 2.76 | 6.24 | |
| 23 | | R. RodrÃguez | 11.90 | 50.2 | 2025 | 50 | 3 | 5 | .375 | 0 | 1.78 | 67 | 0 | 0 | 4 | 34 | 10 | 12 | 4 | 11 | 4 | 15 | 0 | 198 | 2 | 1.95 | 6.09 | 0.71 | 33.8 | 5.6 | 0.89 | .268 | 2.13 | 6.04 | |
| 24 | | P. Maton | 11.89 | 61.1 | 2025 | TOT | 63 | 4 | 5 | .444 | 0 | 2.79 | 81 | 0 | 0 | 5 | 42 | 19 | 21 | 3 | 23 | 7 | 22 | 2 | 248 | 1 | 3.38 | 3.52 | 0.44 | 32.7 | 9.3 | 1.06 | .291 | 3.08 | 6.16 |
| 25 | | B. Brown | 11.74 | 30.2 | 2025 | 10 | 0 | 3 | .000 | 0 | 4.99 | 40 | 0 | 0 | 1 | 29 | 17 | 20 | 4 | 9 | 0 | 3 | 0 | 131 | 4 | 2.64 | 4.44 | 1.17 | 30.5 | 6.9 | 1.24 | .321 | 5.87 | 8.51 | |
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SFGStatMuse has game-level data for K/9 and innings pitched going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
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More Athletics Stats
Team Batting Leaders 
HR
23
Langeliers
RBI
69
Kurtz
AVG
.280
Bolte
Team Pitching Leaders
W
9
Ginn
K
140
Perkins
ERA
3.71
Ginn
Team Rankings
HR
194
11th
R
699
20th
SO
1,347
14th
ERA
5.48
29th
Rangers
Athletics
Angels
MLB 2026 Batting Leaders
MLB 2026 Pitching Leaders
MLB Fantasy 2026
MLB 2026 Betting
MLB 2026 Standings
| NL East | W | L | PCT | GB |
|---|---|---|---|---|
 Braves - y | 94 | 67 | .584 | |
87 | 74 | .540 | 7.0 | |
79 | 82 | .491 | 15.0 | |
76 | 85 | .472 | 18.0 | |
74 | 87 | .460 | 20.0 | |
| NL Central | W | L | PCT | GB |
 Brewers - y | 102 | 59 | .634 | |
 Cubs - w | 88 | 73 | .547 | 14.0 |
81 | 80 | .503 | 21.0 | |
77 | 84 | .478 | 25.0 | |
75 | 86 | .466 | 27.0 | |
| NL West | W | L | PCT | GB |
 Dodgers - y | 99 | 62 | .615 | |
 Padres - w | 90 | 71 | .559 | 9.0 |
86 | 75 | .534 | 13.0 | |
65 | 96 | .404 | 34.0 | |
58 | 103 | .360 | 41.0 |
Phillies
Nationals
Cardinals
Reds
Diamondbacks
Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
 Rays - y | 98 | 63 | .609 | |
 Yankees - w | 93 | 68 | .578 | 5.0 |
 Red Sox - w | 87 | 74 | .540 | 11.0 |
79 | 82 | .491 | 19.0 | |
78 | 83 | .484 | 20.0 | |
| AL Central | W | L | PCT | GB |
 Guardians - y | 85 | 76 | .528 | |
 White Sox - x | 83 | 78 | .516 | 2.0 |
76 | 85 | .472 | 9.0 | |
76 | 85 | .472 | 9.0 | |
68 | 93 | .422 | 17.0 | |
| AL West | W | L | PCT | GB |
80 | 81 | .497 | ||
80 | 81 | .497 | ||
75 | 86 | .466 | 5.0 | |
64 | 97 | .398 | 16.0 | |
62 | 99 | .385 | 18.0 |
Twins
Tigers
Royals