
50 pitchers are tied for the highest K/9 by a relief pitcher in a season, with 27.00 per nine innings. The first three are Joe La Sorsa and Yunior Marte this season and Jayvien Sandridge in 2025.
| NAME | K/9 | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | H/9 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | J. La Sorsa | 27.00 | 2026 | 1 | 0 | 0 | 0 | 27.00 | 1 | 0 | 0 | 0 | 0.1 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 2 | 0 | 0.00 | 27.00 | 50.0 | 0.0 | 3.00 | 27.00 | 27.00 | |||||
| 2 | Y. Marte | 27.00 | 2026 | 1 | 0 | 0 | 0 | 108.00 | 1 | 0 | 0 | 0 | 0.1 | 3 | 4 | 4 | 0 | 1 | 1 | 0 | 1 | 6 | 0 | 27.00 | 1.00 | 0.00 | 16.7 | 16.7 | 12.00 | 1.000 | 108.00 | 81.00 | |||
| 3 | J. Sandridge | 27.00 | 2025 | 1 | 0 | 0 | 0 | 27.00 | 2 | 0 | 0 | 0 | 0.2 | 1 | 2 | 2 | 1 | 2 | 1 | 0 | 0 | 6 | 0 | 27.00 | 1.00 | 13.50 | 33.3 | 33.3 | 4.50 | 27.00 | 13.50 | ||||
| 4 | W. Warren | 27.00 | 2024 | 1 | 0 | 0 | 0 | 27.00 | 3 | 0 | 0 | 0 | 1.0 | 2 | 3 | 3 | 1 | 1 | 0 | 1 | 0 | 6 | 0 | 9.00 | 3.00 | 9.00 | 50.0 | 16.7 | 3.00 | 1.000 | 27.00 | 18.00 | |||
| 5 | E. Justice | 27.00 | 2024 | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 2 | 0 | 27.00 | 1.00 | 0.00 | 50.0 | 50.0 | 3.00 | 0.00 | 0.00 | ||||
| 6 | C. Andrews | 27.00 | 2024 | 1 | 0 | 0 | 0 | 27.00 | 1 | 0 | 0 | 0 | 0.1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 3 | 0 | 0.00 | 27.00 | 33.3 | 0.0 | 3.00 | 27.00 | 27.00 | |||||
| 7 | R. Gonzalez | 27.00 | 2021 | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0.00 | 0.00 | 100.0 | 0.0 | 0.00 | 0.00 | 0.00 | |||||
| 8 | K. Quackenbush | 27.00 | 2021 | 1 | 0 | 0 | 0 | 27.00 | 1 | 0 | 0 | 0 | 0.1 | 3 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0.00 | 0.00 | 25.0 | 0.0 | 9.00 | 1.000 | 27.00 | 81.00 | ||||
| 9 | N. Maton | 27.00 | 2021 | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0.00 | 0.00 | 100.0 | 0.0 | 0.00 | 0.00 | 0.00 | |||||
| 10 | M. Freeman | 27.00 | 2021 | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0.00 | 0.00 | 100.0 | 0.0 | 0.00 | 0.00 | 0.00 | |||||
| 11 | W. Crowe | 27.00 | 2021 | 1 | 0 | 0 | 0 | 13.50 | 2 | 0 | 0 | 0 | 0.2 | 1 | 1 | 1 | 0 | 2 | 0 | 0 | 0 | 5 | 2 | 27.00 | 1.00 | 0.00 | 40.0 | 40.0 | 4.50 | 1.000 | 13.50 | 13.50 | |||
| 12 | C. Roe | 27.00 | 2021 | 1 | 0 | 0 | 0 | 27.00 | 2 | 0 | 0 | 0 | 0.2 | 1 | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 4 | 0 | 13.50 | 2.00 | 0.00 | 50.0 | 25.0 | 3.00 | 1.000 | 27.00 | 13.50 | |||
| 13 | F. Peralta | 27.00 | 2021 | 1 | 0 | 0 | 0 | 0.00 | 6 | 0 | 0 | 0 | 2.0 | 2 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 11 | 0 | 13.50 | 2.00 | 0.00 | 54.5 | 27.3 | 2.50 | 1.000 | 0.00 | 9.00 | |||
| 14 | M. Brosseau | 27.00 | 2020 | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0.00 | 0.00 | 100.0 | 0.0 | 0.00 | 0.00 | 0.00 | |||||
| 15 | J. Beasley | 27.00 | 2020 | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.1 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 3 | 0 | 0.00 | 0.00 | 33.3 | 0.0 | 6.00 | 1.000 | 0.00 | 54.00 | ||||
| 16 | T. Kahnle | 27.00 | 2020 | 1 | 0 | 0 | 0 | 0.00 | 3 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 6 | 0 | 9.00 | 3.00 | 0.00 | 50.0 | 16.7 | 2.00 | .500 | 0.00 | 9.00 | |||
| 17 | D. Betances | 27.00 | 2019 | 1 | 0 | 0 | 0 | 0.00 | 2 | 0 | 0 | 0 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0.00 | 0.00 | 100.0 | 0.0 | 0.00 | 0.00 | 0.00 | |||||
| 18 | J. Castillo | 27.00 | 2019 | 1 | 0 | 0 | 0 | 0.00 | 2 | 0 | 0 | 0 | 0.2 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 4 | 1 | 13.50 | 2.00 | 0.00 | 50.0 | 25.0 | 1.50 | 0.00 | 0.00 | ||||
| 19 | A. Wojciechowski | 27.00 | 2019 | 1 | 0 | 0 | 0 | 0.00 | 2 | 0 | 0 | 0 | 0.2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 0.00 | 0.00 | 66.7 | 0.0 | 1.50 | 1.000 | 0.00 | 13.50 | ||||
| 20 | J. Gyorko | 27.00 | 2019 | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0.00 | 0.00 | 100.0 | 0.0 | 0.00 | 0.00 | 0.00 | |||||
| 21 | A. Williams | 27.00 | 2019 | 2 | 0 | 0 | 0 | 162.00 | 1 | 0 | 0 | 0 | 0.1 | 5 | 6 | 6 | 2 | 1 | 0 | 0 | 0 | 7 | 0 | 27.00 | 1.00 | 54.00 | 14.3 | 14.3 | 18.00 | 1.000 | 162.00 | 135.00 | |||
| 22 | A. Sampson | 27.00 | 2018 | 1 | 0 | 0 | 0 | 54.00 | 1 | 0 | 0 | 0 | 0.1 | 4 | 2 | 3 | 1 | 0 | 0 | 0 | 0 | 6 | 0 | 0.00 | 27.00 | 16.7 | 0.0 | 12.00 | .750 | 81.00 | 108.00 | ||||
| 23 | D. Valencia | 27.00 | 2018 | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0.00 | 0.00 | 100.0 | 0.0 | 0.00 | 0.00 | 0.00 | |||||
| 24 | J. Bleich | 27.00 | 2018 | 2 | 0 | 0 | 0 | 54.00 | 1 | 0 | 0 | 0 | 0.1 | 2 | 2 | 2 | 0 | 0 | 1 | 0 | 0 | 4 | 0 | 0.00 | 0.00 | 25.0 | 0.0 | 6.00 | 1.000 | 54.00 | 54.00 | ||||
| 25 | R. Elias | 27.00 | 2017 | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 2 | 0 | 27.00 | 1.00 | 0.00 | 50.0 | 50.0 | 3.00 | 0.00 | 0.00 | ||||
StatMuse has game-level data for K/9 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 | |
73 | 76 | .490 | 14.5 | |
69 | 79 | .466 | 18.0 | |
69 | 81 | .460 | 19.0 | |
| NL Central | W | L | PCT | GB |
92 | 56 | .622 | ||
83 | 66 | .557 | 9.5 | |
74 | 75 | .497 | 18.5 | |
73 | 75 | .493 | 19.0 | |
69 | 78 | .469 | 22.5 | |
| NL West | W | L | PCT | GB |
90 | 58 | .608 | ||
80 | 68 | .541 | 10.0 | |
79 | 69 | .534 | 11.0 | |
62 | 87 | .416 | 28.5 | |
55 | 93 | .372 | 35.0 |
| AL East | W | L | PCT | GB |
|---|---|---|---|---|
88 | 59 | .599 | ||
85 | 63 | .574 | 3.5 | |
81 | 68 | .544 | 8.0 | |
74 | 75 | .497 | 15.0 | |
72 | 77 | .483 | 17.0 | |
| AL Central | W | L | PCT | GB |
75 | 72 | .510 | ||
75 | 74 | .503 | 1.0 | |
70 | 78 | .473 | 5.5 | |
69 | 79 | .466 | 6.5 | |
66 | 83 | .443 | 10.0 | |
| 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 | 92 | .378 | 19.0 |