Team pitching -- 2021 Chicago Cubs
Regular season -- as of 9/21/2021
| Primary |
 | Name | P | ERA | W | L | S | G | GS | CG | SHO | INN | H | R | ER | BB | K | HR | GDP | BF |
| | Bass | mr | 2.25 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 8.0 | 7 | 3 | 2 | 0 | 4 | 0 | 0 | 31 |
| | Montgomery,M* | mr | 3.86 | 1 | 2 | 2 | 55 | 0 | 0 | 0 | 79.1 | 94 | 38 | 34 | 27 | 58 | 9 | 5 | 353 |
| | Smith,Ca* | sp | 3.90 | 6 | 10 | 0 | 25 | 25 | 0 | 0 | 147.2 | 144 | 67 | 64 | 40 | 155 | 23 | 6 | 618 |
| | Lindblom | sp | 4.50 | 10 | 9 | 0 | 24 | 24 | 0 | 0 | 132.0 | 146 | 71 | 66 | 25 | 118 | 15 | 5 | 568 |
| f | Mikolas | sp | 4.60 | 9 | 14 | 0 | 29 | 29 | 2 | 1 | 193.2 | 194 | 103 | 99 | 39 | 136 | 25 | 20 | 808 |
| n | Castro,M | mr | 4.74 | 4 | 6 | 31 | 62 | 0 | 0 | 0 | 76.0 | 88 | 43 | 40 | 35 | 56 | 7 | 10 | 343 |
| | Boyd* | sp | 5.10 | 6 | 15 | 0 | 31 | 31 | 2 | 0 | 185.1 | 199 | 121 | 105 | 47 | 215 | 31 | 10 | 806 |
| | Mills,A | sp | 5.26 | 3 | 4 | 0 | 62 | 0 | 0 | 0 | 101.0 | 108 | 61 | 59 | 41 | 89 | 16 | 13 | 440 |
| | Nelson,J | sp | 5.31 | 5 | 5 | 0 | 47 | 0 | 0 | 0 | 62.2 | 76 | 44 | 37 | 29 | 56 | 9 | 6 | 286 |
| | Norris,D* | sp | 5.54 | 1 | 16 | 0 | 27 | 27 | 0 | 0 | 138.0 | 166 | 101 | 85 | 47 | 131 | 24 | 13 | 627 |
| | Cahill | sp | 5.67 | 2 | 9 | 1 | 64 | 0 | 0 | 0 | 81.0 | 99 | 64 | 51 | 41 | 65 | 15 | 6 | 389 |
| | Walker,Je | mr | 6.39 | 4 | 3 | 3 | 65 | 0 | 0 | 0 | 100.0 | 128 | 74 | 71 | 34 | 76 | 17 | 9 | 456 |
| | Pearson | sp | 6.92 | 4 | 14 | 0 | 26 | 26 | 1 | 0 | 128.2 | 164 | 110 | 99 | 43 | 125 | 26 | 5 | 597 |
|   | Total |   | 5.10 | 55 | 107 | 37 | 162 | 162 | 5 | 3 | 1433.1 | 1613 | 900 | 812 | 448 | 1284 | 217 | 108 | 6322 |
| Secondary |
 | Name | P | SB | CS | IW | HBP | WP | BK | SH | SF | CI | H/9 | BB/9 | R/9 | K/9 | HR/9 | K/BB | NP/G | STR% |
| | Bass | mr | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.9 | 0.0 | 7.9 | 4.5 | 0.0 | 99.0 | 33.0 | .707 |
| | Montgomery,M* | mr | 1 | 2 | 1 | 0 | 3 | 1 | 0 | 1 | 0 | 10.7 | 3.1 | 13.7 | 6.6 | 1.0 | 2.1 | 22.6 | .628 |
| | Smith,Ca* | sp | 5 | 7 | 0 | 3 | 1 | 1 | 0 | 2 | 0 | 8.8 | 2.4 | 11.4 | 9.4 | 1.4 | 3.9 | 97.7 | .627 |
| | Lindblom | sp | 7 | 2 | 2 | 6 | 7 | 1 | 0 | 1 | 0 | 10.0 | 1.7 | 12.1 | 8.0 | 1.0 | 4.7 | 87.5 | .650 |
| f | Mikolas | sp | 4 | 5 | 2 | 12 | 2 | 0 | 0 | 4 | 1 | 9.0 | 1.8 | 11.4 | 6.3 | 1.2 | 3.5 | 98.1 | .664 |
| n | Castro,M | mr | 2 | 0 | 1 | 2 | 12 | 1 | 0 | 3 | 0 | 10.4 | 4.1 | 14.8 | 6.6 | 0.8 | 1.6 | 20.5 | .589 |
| | Boyd* | sp | 1 | 2 | 1 | 4 | 0 | 1 | 0 | 1 | 0 | 9.7 | 2.3 | 12.1 | 10.4 | 1.5 | 4.6 | 96.8 | .652 |
| | Mills,A | sp | 2 | 2 | 1 | 1 | 4 | 0 | 0 | 3 | 0 | 9.6 | 3.7 | 13.4 | 7.9 | 1.4 | 2.2 | 26.8 | .615 |
| | Nelson,J | sp | 7 | 4 | 0 | 3 | 5 | 0 | 1 | 1 | 0 | 10.9 | 4.2 | 15.5 | 8.0 | 1.3 | 1.9 | 24.1 | .599 |
| | Norris,D* | sp | 6 | 4 | 0 | 4 | 3 | 2 | 0 | 4 | 0 | 10.8 | 3.1 | 14.2 | 8.5 | 1.6 | 2.8 | 86.1 | .628 |
| | Cahill | sp | 4 | 3 | 1 | 10 | 9 | 0 | 1 | 3 | 0 | 11.0 | 4.6 | 16.7 | 7.2 | 1.7 | 1.6 | 22.2 | .595 |
| | Walker,Je | mr | 4 | 3 | 0 | 4 | 3 | 0 | 1 | 3 | 0 | 11.5 | 3.1 | 14.9 | 6.8 | 1.5 | 2.2 | 25.4 | .616 |
| | Pearson | sp | 7 | 6 | 0 | 10 | 8 | 0 | 0 | 3 | 0 | 11.5 | 3.0 | 15.2 | 8.7 | 1.8 | 2.9 | 84.8 | .639 |
|   | Total |   | 50 | 40 | 9 | 59 | 57 | 7 | 3 | 29 | 1 | 10.1 | 2.8 | 13.3 | 8.1 | 1.4 | 2.9 |   | .631 |
| Analytical |
 | Name | P | OPS | WHIP | BIP | BABIP | TBW | /BF | TBWH | /BF | RC | RC27 | RCERA | CERA |
| | Bass | mr | .613 | 0.88 | 27 | .259 | 12 | .387 | 12 | .387 | 2.7 | 3.0 | 2.74 | 1.49 |
| | Montgomery,M* | mr | .789 | 1.53 | 259 | .328 | 172 | .487 | 172 | .487 | 49.3 | 5.6 | 5.04 | 4.94 |
| | Smith,Ca* | sp | .737 | 1.25 | 397 | .305 | 289 | .468 | 292 | .472 | 74.3 | 4.5 | 4.07 | 3.89 |
| | Lindblom | sp | .758 | 1.30 | 404 | .324 | 264 | .465 | 270 | .475 | 75.0 | 5.1 | 4.60 | 4.03 |
| f | Mikolas | sp | .704 | 1.20 | 596 | .284 | 340 | .421 | 352 | .436 | 86.7 | 4.0 | 3.62 | 3.74 |
| n | Castro,M | mr | .777 | 1.62 | 243 | .333 | 160 | .466 | 162 | .472 | 45.9 | 5.4 | 4.89 | 5.29 |
| | Boyd* | sp | .769 | 1.33 | 509 | .330 | 393 | .488 | 397 | .493 | 106.3 | 5.1 | 4.65 | 4.35 |
| | Mills,A | sp | .789 | 1.48 | 293 | .314 | 218 | .495 | 219 | .498 | 58.4 | 5.2 | 4.68 | 4.99 |
| | Nelson,J | sp | .851 | 1.68 | 189 | .354 | 148 | .517 | 151 | .528 | 45.2 | 6.5 | 5.85 | 6.21 |
| | Norris,D* | sp | .839 | 1.54 | 421 | .337 | 329 | .525 | 333 | .531 | 95.8 | 6.1 | 5.63 | 5.59 |
| | Cahill | sp | .875 | 1.73 | 258 | .326 | 204 | .524 | 214 | .550 | 65.3 | 7.1 | 6.53 | 6.95 |
| | Walker,Je | mr | .865 | 1.62 | 325 | .342 | 241 | .529 | 245 | .537 | 74.6 | 6.7 | 6.05 | 6.18 |
| | Pearson | sp | .888 | 1.61 | 393 | .351 | 327 | .548 | 337 | .564 | 104.5 | 7.2 | 6.58 | 6.47 |
|   | Total |   | .794 | 1.44 | 4314 | .324 | 3097 | .490 | 3156 | .499 | 880.1 | 5.5 | 4.97 | 4.94 |
| Start |
 | Name | P | GS | CG | CG% | SHO | QS | QS% | RS | RS/G | RL | RLS | RL% |
| | Bass | mr | 0 | 0 | .000 | 0 | 0 | .000 | 0 | 0.0 | 2 | 0 | .000 |
| | Montgomery,M* | mr | 0 | 0 | .000 | 0 | 0 | .000 | 0 | 0.0 | 27 | 7 | .259 |
| | Smith,Ca* | sp | 25 | 0 | .000 | 0 | 14 | .560 | 86 | 3.4 | 18 | 2 | .111 |
| | Lindblom | sp | 24 | 0 | .000 | 0 | 11 | .458 | 101 | 4.2 | 15 | 7 | .467 |
| f | Mikolas | sp | 29 | 2 | .069 | 1 | 17 | .586 | 111 | 3.8 | 23 | 12 | .522 |
| n | Castro,M | mr | 0 | 0 | .000 | 0 | 0 | .000 | 0 | 0.0 | 11 | 4 | .364 |
| | Boyd* | sp | 31 | 2 | .065 | 0 | 13 | .419 | 128 | 4.1 | 14 | 6 | .429 |
| | Mills,A | sp | 0 | 0 | .000 | 0 | 0 | .000 | 0 | 0.0 | 32 | 12 | .375 |
| | Nelson,J | sp | 0 | 0 | .000 | 0 | 0 | .000 | 0 | 0.0 | 26 | 10 | .385 |
| | Norris,D* | sp | 27 | 0 | .000 | 0 | 9 | .333 | 92 | 3.4 | 25 | 9 | .360 |
| | Cahill | sp | 0 | 0 | .000 | 0 | 0 | .000 | 0 | 0.0 | 41 | 11 | .268 |
| | Walker,Je | mr | 0 | 0 | .000 | 0 | 0 | .000 | 0 | 0.0 | 23 | 8 | .348 |
| | Pearson | sp | 26 | 1 | .038 | 0 | 5 | .192 | 137 | 5.3 | 15 | 3 | .200 |
|   | Total |   | 162 | 5 | .031 | 3 | 69 | .426 | 655 | 4.0 | 272 | 91 | .335 |
| Relief |
 | Name | P | SVO | S | SV% | BS | BS% | HLD | IR | IRS | IR% | G | GR | GF |
| | Bass | mr | 0 | 0 | .000 | 0 | .000 | 0 | 5 | 2 | .400 | 3 | 3 | 2 |
| | Montgomery,M* | mr | 6 | 2 | .333 | 3 | .500 | 12 | 47 | 22 | .468 | 55 | 55 | 20 |
| | Smith,Ca* | sp | 0 | 0 | .000 | 0 | .000 | 0 | 0 | 0 | .000 | 25 | 0 | 0 |
| | Lindblom | sp | 0 | 0 | .000 | 0 | .000 | 0 | 0 | 0 | .000 | 24 | 0 | 0 |
| f | Mikolas | sp | 0 | 0 | .000 | 0 | .000 | 0 | 0 | 0 | .000 | 29 | 0 | 0 |
| n | Castro,M | mr | 43 | 31 | .721 | 12 | .279 | 2 | 54 | 15 | .278 | 62 | 62 | 51 |
| | Boyd* | sp | 0 | 0 | .000 | 0 | .000 | 0 | 0 | 0 | .000 | 31 | 0 | 0 |
| | Mills,A | sp | 1 | 0 | .000 | 1 | 1.000 | 5 | 48 | 9 | .188 | 62 | 62 | 18 |
| | Nelson,J | sp | 4 | 0 | .000 | 3 | .750 | 8 | 26 | 10 | .385 | 47 | 47 | 17 |
| | Norris,D* | sp | 0 | 0 | .000 | 0 | .000 | 0 | 0 | 0 | .000 | 27 | 0 | 0 |
| | Cahill | sp | 6 | 1 | .167 | 3 | .500 | 15 | 39 | 12 | .308 | 64 | 64 | 20 |
| | Walker,Je | mr | 4 | 3 | .750 | 1 | .250 | 3 | 53 | 21 | .396 | 65 | 65 | 29 |
| | Pearson | sp | 0 | 0 | .000 | 0 | .000 | 0 | 0 | 0 | .000 | 26 | 0 | 0 |
|   | Total |   | 64 | 37 | .578 | 23 | .359 | 45 | 272 | 91 | .335 | 162 | 358 | 157 |