So far in his career, Mitchell has surrendered 1,464 base knocks while earning 921 K’s in 1,632 frames. He has surrendered a total of 522 earned runs while holding a WHIP of 1.268 and a FIP of 2.7. He has a strikeout to walk ratio of 1.52 and he has gone up against 6,694 opposing batters so far in his MLB career. Mitchell (83-92 win-loss record in his career) has earned a 2.88 ERA while conceding 8.1 hits per nine innings.
Willie Mitchell Stats
| Year | Team | G | IP | W | L | WHIP | ERA | H | BB | SO | FIP | SV | GS | HR | ER | R | BF | SO/W | H/9 | SO/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Career | 276 | 1632.0 | 83 | 92 | 1.268 | 2.88 | 1,464 | 605 | 921 | 2.71 | 4 | 190 | 14 | 522 | 731 | 6,694 | 1.52 | 8.1 | 5.1 | |
| 1919 | DET | 3 | 13.2 | 1 | 2 | 1.610 | 5.27 | 12 | 10 | 4 | 6.22 | 0 | 2 | 2 | 8 | 8 | 58 | 0.40 | 7.9 | 2.6 |
| 1918 | DET | 1 | 4.0 | 0 | 1 | 2.000 | 9.00 | 3 | 5 | 2 | 4.98 | 0 | 1 | 0 | 4 | 4 | 20 | 0.40 | 6.8 | 4.5 |
| 1917 | DET | 30 | 185.1 | 12 | 8 | 1.176 | 2.19 | 172 | 46 | 80 | 2.49 | 0 | 22 | 2 | 45 | 66 | 747 | 1.74 | 8.4 | 3.9 |
| 1916 | TOT | 35 | 171.1 | 9 | 10 | 1.407 | 3.78 | 174 | 67 | 84 | 2.75 | 1 | 23 | 2 | 72 | 88 | 720 | 1.25 | 9.1 | 4.4 |
| 1916 | CLE | 12 | 43.2 | 2 | 5 | 1.695 | 5.15 | 55 | 19 | 24 | 2.82 | 1 | 6 | 1 | 25 | 35 | 197 | 1.26 | 11.3 | 4.9 |
| 1916 | DET | 23 | 127.2 | 7 | 5 | 1.308 | 3.31 | 119 | 48 | 60 | 2.72 | 0 | 17 | 1 | 47 | 53 | 523 | 1.25 | 8.4 | 4.2 |
| 1915 | CLE | 36 | 236.0 | 11 | 14 | 1.246 | 2.82 | 210 | 84 | 149 | 2.29 | 1 | 30 | 1 | 74 | 103 | 958 | 1.77 | 8.0 | 5.7 |
| 1914 | CLE | 39 | 257.0 | 11 | 17 | 1.370 | 3.19 | 228 | 124 | 179 | 2.72 | 1 | 32 | 3 | 91 | 127 | 1,088 | 1.44 | 8.0 | 6.3 |
| 1913 | CLE | 35 | 217.0 | 14 | 8 | 1.111 | 1.91 | 153 | 88 | 141 | 2.64 | 0 | 22 | 1 | 46 | 62 | 856 | 1.60 | 6.3 | 5.8 |
| 1912 | CLE | 29 | 163.2 | 5 | 8 | 1.253 | 2.80 | 149 | 56 | 94 | 2.86 | 1 | 15 | 0 | 51 | 88 | 685 | 1.68 | 8.2 | 5.2 |
| 1911 | CLE | 30 | 177.1 | 7 | 14 | 1.410 | 3.76 | 190 | 60 | 78 | 3.20 | 0 | 22 | 1 | 74 | 102 | 742 | 1.30 | 9.6 | 4.0 |
| 1910 | CLE | 35 | 183.2 | 12 | 8 | 1.143 | 2.60 | 155 | 55 | 102 | 2.49 | 0 | 18 | 2 | 53 | 77 | 726 | 1.85 | 7.6 | 5.0 |
| 1909 | CLE | 3 | 23.0 | 1 | 2 | 1.217 | 1.57 | 18 | 10 | 8 | 3.35 | 0 | 3 | 0 | 4 | 6 | 94 | 0.80 | 7.0 | 3.1 |
