P · 7 seasons · 1983 – 1990 · B/T: R/R
Al Nipper ranks 1st of 0 pitchers by career roto value, one of the highest totals the site records. 1984 was the high-water mark, worth +1.7, 103rd that season and 12543rd of 51,303 player-seasons on record. On the credit side, wins (+2.2). On the debit side, ERA (-4.5) and WHIP (-3.7).
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1983 | BOS | 3 | -2.26 | #494 | #83,824 |
| 1984 | BOS | 29 | -2.28 | #520 | #85,750 |
| 1985 | BOS | 25 | -2.24 | #482 | #81,373 |
| 1986 | BOS | 26 | -2.31 | #503 | #89,072 |
| 1987 | BOS | 30 | -2.28 | #490 | #85,085 |
| 1988 | CHC | 22 | -2.70 | #931 | #104,733 |
| 1990★ | CLE | 9 | -2.19 | #504 | #76,022 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1983 | BOS | 3 | -2.22 | #259 | #34,961 |
| 1984★ | BOS | 29 | 1.67 | #103 | #12,543 |
| 1985 | BOS | 25 | -0.27 | #167 | #19,682 |
| 1986 | BOS | 26 | -2.13 | #253 | #33,536 |
| 1987 | BOS | 30 | -1.47 | #224 | #26,399 |
| 1988 | CHC | 22 | -0.75 | #183 | #22,003 |
| 1990 | CLE | 9 | -3.67 | #463 | #49,082 |
★ Best season by Z