Between the 2016 and 2021 seasons, 7 pitchers were tied for the highest K/9 by a starting pitcher, with 27.00 per nine innings. The first three are Sam Howard, Jay Jackson and Cristopher Sánchez.
| NAME | K/9 | 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 |  | S. Howard | 27.00 | 1 | 0 | 0 | 1 | 0.00 | 3 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0.00 | 0.00 | 100.0 | 0.0 | 0.00 | 0.00 | 0.00 | |||
| 2 | | J. Jackson | 27.00 | 1 | 0 | 1 | .000 | 1 | 81.00 | 1 | 0 | 0 | 0 | 0.1 | 1 | 3 | 3 | 1 | 2 | 0 | 0 | 0 | 4 | 0 | 54.00 | 0.50 | 27.00 | 25.0 | 50.0 | 9.00 | 81.00 | 27.00 | |
| 3 |  | C. Sánchez | 27.00 | 1 | 0 | 0 | 1 | 108.00 | 1 | 0 | 0 | 0 | 0.1 | 3 | 4 | 4 | 0 | 1 | 0 | 0 | 0 | 5 | 0 | 27.00 | 1.00 | 0.00 | 20.0 | 20.0 | 12.00 | 1.000 | 108.00 | 81.00 | |
| 4 | | A. Brice | 27.00 | 1 | 0 | 0 | 1 | 0.00 | 3 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 6 | 0 | 18.00 | 1.50 | 0.00 | 50.0 | 33.3 | 2.00 | .000 | 0.00 | 0.00 | |
| 5 | | J. Barnes | 27.00 | 1 | 0 | 0 | 1 | 27.00 | 3 | 0 | 0 | 0 | 1.0 | 2 | 3 | 3 | 1 | 3 | 0 | 0 | 0 | 8 | 1 | 27.00 | 1.00 | 9.00 | 37.5 | 37.5 | 5.00 | 1.000 | 27.00 | 18.00 | |
| 6 | | J. Schultz | 27.00 | 1 | 0 | 1 | .000 | 1 | 54.00 | 2 | 0 | 0 | 0 | 0.2 | 2 | 4 | 4 | 1 | 2 | 0 | 0 | 0 | 6 | 1 | 27.00 | 1.00 | 13.50 | 33.3 | 33.3 | 6.00 | 1.000 | 54.00 | 27.00 |
| 7 | | J. Venters | 27.00 | 1 | 0 | 1 | .000 | 1 | 135.00 | 1 | 0 | 0 | 0 | 0.1 | 3 | 5 | 5 | 0 | 2 | 0 | 0 | 0 | 6 | 0 | 54.00 | 0.50 | 0.00 | 16.7 | 33.3 | 15.00 | 1.000 | 135.00 | 81.00 |
| 8 | | D. Hernandez | 21.00 | 1 | 0 | 1 | .000 | 1 | 9.00 | 7 | 0 | 0 | 0 | 3.0 | 3 | 3 | 4 | 0 | 5 | 0 | 0 | 0 | 18 | 0 | 15.00 | 1.40 | 0.00 | 38.9 | 27.8 | 2.67 | .500 | 12.00 | 9.00 |
| 9 | | P. Maton | 20.25 | 1 | 0 | 0 | 1 | 6.75 | 3 | 0 | 0 | 0 | 1.1 | 2 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 7 | 0 | 6.75 | 3.00 | 0.00 | 42.9 | 14.3 | 2.25 | .667 | 6.75 | 13.50 | |
| 10 | | C. Greene | 18.00 | 1 | 0 | 0 | 1 | 0.00 | 2 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 5 | 1 | 0.00 | 0.00 | 40.0 | 0.0 | 1.00 | .500 | 0.00 | 9.00 | ||
| 11 | | P. Johnson | 18.00 | 2 | 0 | 1 | .000 | 2 | 4.50 | 4 | 0 | 0 | 0 | 2.0 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 10 | 0 | 4.50 | 4.00 | 4.50 | 40.0 | 10.0 | 1.50 | .333 | 4.50 | 9.00 |
| 12 | | L. Head | 18.00 | 2 | 0 | 0 | 2 | 9.00 | 4 | 0 | 0 | 0 | 2.0 | 3 | 2 | 2 | 1 | 0 | 0 | 0 | 0 | 9 | 0 | 0.00 | 4.50 | 44.4 | 0.0 | 1.50 | .500 | 9.00 | 13.50 | ||
| 13 | | L. Oviedo | 18.00 | 1 | 0 | 1 | .000 | 1 | 54.00 | 2 | 0 | 0 | 0 | 1.0 | 5 | 6 | 8 | 1 | 3 | 1 | 0 | 0 | 13 | 0 | 27.00 | 0.67 | 9.00 | 15.4 | 23.1 | 8.00 | .667 | 72.00 | 45.00 |
| 14 | | A. Bass | 18.00 | 1 | 0 | 1 | .000 | 1 | 9.00 | 2 | 0 | 0 | 0 | 1.0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 4 | 0 | 0.00 | 9.00 | 50.0 | 0.0 | 1.00 | .000 | 9.00 | 9.00 | |
| 15 | | R. Leyer | 18.00 | 1 | 0 | 0 | 1 | 0.00 | 2 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 5 | 0 | 9.00 | 2.00 | 0.00 | 40.0 | 20.0 | 2.00 | .500 | 0.00 | 9.00 | |
| 16 | | J. Taylor | 18.00 | 1 | 0 | 0 | 1 | 0.00 | 2 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 6 | 0 | 18.00 | 1.00 | 0.00 | 33.3 | 33.3 | 3.00 | .500 | 0.00 | 9.00 | |
| 17 | | J. Soria | 18.00 | 1 | 0 | 0 | 1 | 9.00 | 2 | 0 | 0 | 0 | 1.0 | 2 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 5 | 0 | 0.00 | 9.00 | 40.0 | 0.0 | 2.00 | .500 | 9.00 | 18.00 | ||
| 18 | | J. Fry | 18.00 | 1 | 0 | 1 | .000 | 1 | 9.00 | 2 | 0 | 0 | 0 | 1.0 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 6 | 0 | 9.00 | 2.00 | 9.00 | 33.3 | 16.7 | 3.00 | .500 | 9.00 | 18.00 |
| 19 | | W. Cuevas | 18.00 | 1 | 0 | 1 | .000 | 1 | 9.00 | 4 | 0 | 0 | 0 | 2.0 | 3 | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 10 | 0 | 4.50 | 4.00 | 0.00 | 40.0 | 10.0 | 2.00 | .600 | 9.00 | 13.50 |
| 20 | | M. DuRapau | 16.88 | 2 | 0 | 1 | .000 | 2 | 10.13 | 5 | 0 | 0 | 0 | 2.2 | 4 | 3 | 3 | 1 | 2 | 0 | 0 | 0 | 14 | 0 | 6.75 | 2.50 | 3.38 | 35.7 | 14.3 | 2.25 | .500 | 10.13 | 13.50 |
| 21 | | N. Nelson | 16.20 | 2 | 0 | 1 | .000 | 2 | 16.20 | 3 | 0 | 0 | 0 | 1.2 | 2 | 3 | 3 | 0 | 5 | 1 | 0 | 0 | 13 | 1 | 27.00 | 0.60 | 0.00 | 23.1 | 38.5 | 4.20 | .500 | 16.20 | 10.80 |
| 22 | | B. Graterol | 16.20 | 3 | 0 | 0 | 3 | 8.10 | 6 | 0 | 0 | 0 | 3.1 | 4 | 3 | 3 | 1 | 1 | 0 | 0 | 0 | 14 | 0 | 2.70 | 6.00 | 2.70 | 42.9 | 7.1 | 1.50 | .500 | 8.10 | 10.80 | |
| 23 | | B. Martin | 16.20 | 2 | 0 | 1 | .000 | 2 | 27.00 | 3 | 0 | 0 | 0 | 1.2 | 5 | 5 | 5 | 0 | 2 | 1 | 0 | 0 | 13 | 1 | 10.80 | 1.50 | 0.00 | 23.1 | 15.4 | 4.20 | .714 | 27.00 | 27.00 |
| 24 | | J. Tseng | 16.20 | 2 | 0 | 0 | 2 | 14.40 | 9 | 0 | 0 | 0 | 5.0 | 9 | 8 | 8 | 3 | 1 | 1 | 0 | 0 | 27 | 0 | 1.80 | 9.00 | 5.40 | 33.3 | 3.7 | 2.00 | .462 | 14.40 | 16.20 | |
| 25 | | S. Coonrod | 15.43 | 2 | 0 | 0 | 2 | 3.86 | 4 | 0 | 0 | 0 | 2.1 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 10 | 0 | 3.86 | 4.00 | 0.00 | 40.0 | 10.0 | 0.86 | .250 | 3.86 | 3.86 | |
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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