| # | Pitcher | JJ | JI | G | P | SV | IP | H | CP | CL | HR | BB | K | WHIP | EFE |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Johnny Cueto | 1 | 1 | 0 | 0 | 0 | 6.0 | 2 | 0 | 0 | 0 | 2 | 7 | 0.67 | 0.00 |
| 2 | Michael Kopech | 7 | 7 | 0 | 1 | 0 | 35.0 | 16 | 8 | 6 | 0 | 17 | 33 | 0.94 | 1.54 |
| 3 | Davis Martin | 1 | 1 | 0 | 1 | 0 | 5.0 | 5 | 1 | 1 | 0 | 1 | 7 | 1.20 | 1.80 |
| 4 | Matt Foster | 16 | 0 | 0 | 0 | 0 | 16.2 | 13 | 5 | 5 | 1 | 4 | 17 | 1.02 | 2.70 |
| 5 | Kendall Graveman | 17 | 0 | 0 | 1 | 2 | 19.1 | 19 | 8 | 6 | 0 | 5 | 18 | 1.24 | 2.79 |
| 6 | Lucas Giolito | 6 | 6 | 2 | 1 | 0 | 31.2 | 28 | 10 | 10 | 6 | 11 | 44 | 1.23 | 2.84 |
| 7 | Tanner Banks | 11 | 0 | 0 | 0 | 0 | 18.0 | 14 | 10 | 6 | 3 | 7 | 13 | 1.17 | 3.00 |
| 8 | Dylan Cease | 8 | 8 | 4 | 1 | 0 | 43.2 | 34 | 15 | 15 | 3 | 17 | 67 | 1.17 | 3.09 |
| 9 | Jose Ruiz | 16 | 0 | 0 | 0 | 0 | 14.0 | 11 | 5 | 5 | 2 | 8 | 18 | 1.36 | 3.21 |
| 10 | Bennett Sousa | 16 | 0 | 2 | 0 | 1 | 13.0 | 9 | 5 | 5 | 1 | 5 | 9 | 1.08 | 3.46 |
| 11 | Liam Hendriks | 18 | 0 | 1 | 2 | 12 | 18.1 | 20 | 10 | 8 | 3 | 5 | 28 | 1.36 | 3.93 |
| 12 | Reynaldo Lopez | 13 | 0 | 4 | 1 | 0 | 15.2 | 13 | 8 | 7 | 0 | 4 | 11 | 1.09 | 4.02 |
| 13 | Aaron Bummer | 12 | 0 | 0 | 1 | 1 | 11.0 | 11 | 8 | 6 | 1 | 8 | 15 | 1.73 | 4.91 |
| 14 | Kyle Crick | 8 | 0 | 1 | 0 | 0 | 7.0 | 6 | 4 | 4 | 0 | 7 | 7 | 1.86 | 5.14 |
| 15 | Jimmy Lambert | 2 | 2 | 0 | 2 | 0 | 6.2 | 7 | 4 | 4 | 1 | 3 | 6 | 1.50 | 5.40 |
| 16 | Dallas Keuchel | 6 | 6 | 2 | 3 | 0 | 26.0 | 36 | 21 | 16 | 3 | 15 | 16 | 1.96 | 5.54 |
| 17 | Vince Velasquez | 7 | 7 | 2 | 3 | 0 | 32.2 | 36 | 22 | 21 | 7 | 13 | 28 | 1.50 | 5.79 |
| 18 | Ryan Burr | 8 | 0 | 1 | 1 | 0 | 9.0 | 8 | 7 | 6 | 3 | 4 | 7 | 1.33 | 6.00 |
| 19 | Anderson Severino | 6 | 0 | 0 | 0 | 0 | 7.1 | 7 | 5 | 5 | 0 | 4 | 9 | 1.50 | 6.14 |
| 20 | Joe Kelly | 5 | 0 | 0 | 1 | 0 | 4.0 | 8 | 6 | 6 | 0 | 6 | 4 | 3.50 | 13.50 |
