P · 6 seasons · 1925 – 1937 · B/T: R/R
One category carried Lou Koupal and the rest pulled him back: +1.7 from saves, against a career total of -12.7. The peak came in 1929, +2.1, 76th that season and 11151st of 51,303 player-seasons on record. The value came from saves (+1.7). It leaked back out through WHIP (-4.5), strikeouts (-3.3) and ERA (-3.0).
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1925 | PIT | 7 | -2.51 | #563 | #99,879 |
| 1926★ | PIT | 6 | -2.39 | #542 | #94,714 |
| 1928 | BRO | 17 | -2.56 | #679 | #101,566 |
| 1929 | BRO | 33 | -3.11 | #768 | #109,366 |
| 1930 | PHI | 13 | -2.64 | #665 | #103,580 |
| 1937 | SLA | 26 | -2.55 | #784 | #101,376 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1925 | PIT | 6 | -3.01 | #293 | #45,313 |
| 1926 | PIT | 6 | -2.06 | #198 | #32,546 |
| 1928 | BRO | 17 | -0.84 | #131 | #22,474 |
| 1929★ | PHI | 33 | 2.15 | #76 | #11,151 |
| 1930 | PHI | 13 | -3.92 | #275 | #49,712 |
| 1937 | SLA | 26 | -5.06 | #336 | #50,995 |
★ Best season by Z