P · 6 seasons · 1981 – 1987 · B/T: L/L
Jack O'Connor ranks 1st of 0 pitchers by career roto value, one of the highest totals the site records. The peak came in 1982, -1.0, 184th that season and 23426th of 51,303 player-seasons on record.
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1981 | MIN | 28 | -2.26 | #504 | #83,137 |
| 1982★ | MIN | 23 | -2.23 | #491 | #80,431 |
| 1983 | MIN | 27 | -2.26 | #494 | #83,824 |
| 1984 | MIN | 2 | -2.28 | #520 | #85,750 |
| 1985 | MON | 20 | -2.24 | #482 | #81,373 |
| 1987 | BAL | 29 | -2.28 | #490 | #85,085 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1981 | MIN | 28 | -4.50 | #350 | #50,600 |
| 1982★ | MIN | 23 | -1.00 | #184 | #23,426 |
| 1983 | MIN | 27 | -4.47 | #380 | #50,558 |
| 1984 | MIN | 2 | -2.46 | #277 | #38,509 |
| 1985 | MON | 20 | -2.48 | #290 | #38,887 |
| 1987 | BAL | 29 | -1.63 | #236 | #27,638 |
★ Best season by Z