F · 8 seasons · 1975-76 – 1983-84
One category carried Bill Willoughby and the rest pulled him back: +3.8 from turnovers, against a career total of -15.2. No season of his scores higher than 1981-82, at +0.0, 130th that season and 10299th of 24,555 player-seasons on record. Career value accumulated in turnovers (+3.8) and blocks (+0.8), and drained away in assists (-5.9), steals (-5.4) and points (-4.7). He rates 310 places better per game than on totals, and that gap is the durability story in one number.
| Season ↑ | Tm | GP | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1975-76 | ATL | 62 | -3.24 | #152 | #17,777 |
| 1976-77 | ATL | 39 | -3.85 | #201 | #19,830 |
| 1977-78 | BUF | 56 | -1.96 | #159 | #14,421 |
| 1979-80 | CLE | 78 | -0.57 | #122 | #11,476 |
| 1980-81 | HOU | 55 | -2.01 | #176 | #14,538 |
| 1981-82★ | HOU | 69 | 0.04 | #130 | #10,299 |
| 1982-83 | NJN | 62 | -1.65 | #181 | #13,726 |
| 1983-84 | NJN | 67 | -1.93 | #188 | #14,354 |
★ Best season by Z (season totals)