P · 15 seasons · 1934 – 1948 · B/T: L/L
Fritz Ostermueller ranks 1st of 0 pitchers by career roto value, one of the highest totals the site records. His best year was 1944: +6.8 roto value, 27th that season and 3248th of 51,303 player-seasons on record. He banked roto value in wins (+9.3), strikeouts (+8.2) and ERA (+1.4) and gave it back in WHIP (-2.0).
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1934 | BOS | 33 | -2.84 | #682 | #106,927 |
| 1935 | BOS | 22 | -1.95 | #344 | #50,028 |
| 1936 | BOS | 43 | -2.25 | #435 | #82,898 |
| 1937 | BOS | 25 | -1.47 | #345 | #41,626 |
| 1938 | BOS | 33 | -2.05 | #494 | #57,926 |
| 1939 | BOS | 34 | -2.66 | #770 | #103,892 |
| 1940 | BOS | 33 | -1.43 | #314 | #41,065 |
| 1941 | SLA | 16 | -2.13 | #582 | #70,173 |
| 1942 | SLA | 10 | -2.15 | #539 | #71,820 |
| 1943 | SLA | 19 | -2.37 | #744 | #93,432 |
| 1944 | PIT | 40 | -1.44 | #324 | #41,206 |
| 1945 | PIT | 14 | -1.52 | #347 | #42,163 |
| 1946★ | PIT | 28 | -0.93 | #318 | #36,405 |
| 1947 | PIT | 26 | -2.25 | #698 | #82,594 |
| 1948 | PIT | 23 | -2.29 | #733 | #87,347 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1934 | BOS | 33 | 4.08 | #33 | #6,980 |
| 1935 | BOS | 22 | 0.67 | #88 | #15,779 |
| 1936 | BOS | 43 | 1.70 | #63 | #12,451 |
| 1937 | BOS | 25 | -1.52 | #166 | #26,821 |
| 1938 | BOS | 31 | 2.77 | #67 | #9,605 |
| 1939 | BOS | 34 | 3.83 | #46 | #7,452 |
| 1940 | BOS | 31 | -1.38 | #162 | #25,820 |
| 1941 | SLA | 15 | -2.13 | #216 | #33,500 |
| 1942 | SLA | 10 | -1.42 | #157 | #26,101 |
| 1943 | SLA | 18 | -2.27 | #212 | #35,715 |
| 1944★ | PIT | 38 | 6.84 | #27 | #3,248 |
| 1945 | PIT | 14 | -0.95 | #157 | #23,111 |
| 1946 | PIT | 27 | 4.72 | #41 | #5,907 |
| 1947 | PIT | 26 | 3.10 | #61 | #8,866 |
| 1948 | PIT | 23 | 0.74 | #106 | #15,538 |
★ Best season by Z