P · 12 seasons · 2005 – 2016 · B/T: R/L
Tom Gorzelanny was worth +1.9 in strikeouts alone, more than his entire career total of -6.2 once everything else is counted against him. 2007 was the high-water mark, worth +5.3, 68th that season and 5069th of 51,303 player-seasons on record. On the credit side, strikeouts (+1.9). On the debit side, WHIP (-4.7), saves (-2.9) and ERA (-1.9).
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 2005 | PIT | 3 | -2.14 | #889 | #70,494 |
| 2006 | PIT | 11 | -2.75 | #1,193 | #105,589 |
| 2007 | PIT | 32 | -3.59 | #1,276 | #111,094 |
| 2008 | PIT | 21 | -2.50 | #1,209 | #99,575 |
| 2009 | CHC | 22 | -2.25 | #1,102 | #82,147 |
| 2010 | CHC | 29 | -2.74 | #1,205 | #105,463 |
| 2011 | WSH | 30 | -2.54 | #1,226 | #100,778 |
| 2012 | WSH | 45 | -2.03 | #554 | #55,376 |
| 2013 | MIL | 43 | -2.54 | #1,243 | #100,772 |
| 2014 | MIL | 23 | -2.10 | #983 | #64,706 |
| 2015 | DET | 48 | -2.05 | #594 | #57,954 |
| 2016★ | CLE | 7 | -2.02 | #590 | #54,602 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 2005 | PIT | 3 | -2.83 | #533 | #43,563 |
| 2006 | PIT | 11 | -0.06 | #230 | #18,722 |
| 2007★ | PIT | 32 | 5.28 | #68 | #5,069 |
| 2008 | PIT | 21 | -4.47 | #645 | #50,555 |
| 2009 | CHC | 22 | 0.04 | #235 | #18,252 |
| 2010 | CHC | 29 | 0.54 | #195 | #16,262 |
| 2011 | WSH | 30 | 0.71 | #187 | #15,641 |
| 2012 | WSH | 45 | 0.97 | #193 | #14,787 |
| 2013 | MIL | 43 | 0.30 | #232 | #17,167 |
| 2014 | MIL | 23 | -1.13 | #332 | #24,181 |
| 2015 | DET | 48 | -2.92 | #666 | #44,455 |
| 2016 | CLE | 7 | -2.63 | #632 | #41,088 |
★ Best season by Z