G · 8 seasons · 1952-53 – 1959-60
One category carried Jack McMahon and the rest pulled him back: +9.2 from assists, against a career total of -12.4. The peak came in 1953-54, +1.0, 32nd that season and 8516th of 24,555 player-seasons on record. The value came from assists (+9.2). It leaked back out through field-goal percentage (-9.0), free-throw percentage (-7.7) and rebounds (-4.3).
| Season ↑ | Tm | GP | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1952-53 | ROC | 70 | -1.36 | #71 | #13,080 |
| 1953-54★ | ROC | 71 | 1.01 | #32 | #8,516 |
| 1954-55 | ROC | 72 | -1.78 | #58 | #13,995 |
| 1955-56 | STL | 70 | -3.22 | #74 | #17,705 |
| 1956-57 | STL | 72 | -0.39 | #43 | #11,142 |
| 1957-58 | STL | 72 | -2.09 | #66 | #14,736 |
| 1958-59 | STL | 72 | -1.36 | #53 | #13,051 |
| 1959-60 | STL | 25 | -3.18 | #84 | #17,551 |
★ Best season by Z (season totals)