P · 8 seasons · 1955 – 1965 · B/T: R/L
Few careers score higher: Jack Spring sits 1st of 0 pitchers all-time in roto value, built over 8 seasons. His best year was 1962: -0.2 roto value, 119th that season and 19132nd of 51,303 player-seasons on record.
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1955 | PHI | 2 | -2.19 | #395 | #76,693 |
| 1957 | BOS | 1 | -2.30 | #330 | #87,779 |
| 1958 | WS1 | 3 | -2.32 | #410 | #89,322 |
| 1961 | LAA | 18 | -2.51 | #527 | #99,895 |
| 1962 | LAA | 57 | -2.44 | #577 | #97,161 |
| 1963 | LAA | 45 | -2.28 | #392 | #85,066 |
| 1964 | CHC | 15 | -2.20 | #381 | #77,896 |
| 1965★ | CLE | 14 | -2.17 | #384 | #74,453 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1955 | PHI | 2 | -2.38 | #166 | #37,398 |
| 1957 | BOS | 1 | -2.35 | #156 | #36,932 |
| 1958 | WS1 | 3 | -4.10 | #240 | #50,042 |
| 1961 | LAA | 18 | -1.57 | #136 | #27,198 |
| 1962★ | LAA | 57 | -0.16 | #119 | #19,132 |
| 1963 | LAA | 45 | -1.16 | #143 | #24,341 |
| 1964 | CHC | 15 | -2.63 | #236 | #41,105 |
| 1965 | CLE | 14 | -2.34 | #207 | #36,756 |
★ Best season by Z