P · 15 seasons · 1999 – 2013 · B/T: R/R
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1999 | SEA | 34 | -2.13 | #596 | #68,809 |
| 2000★ | SEA | 21 | -2.00 | #529 | #52,197 |
| 2001 | SEA | 34 | -2.23 | #1,041 | #80,681 |
| 2002 | SEA | 34 | -2.09 | #560 | #63,567 |
| 2003 | SEA | 33 | -2.13 | #882 | #70,148 |
| 2004 | CWS | 31 | -2.26 | #1,063 | #83,685 |
| 2005 | CWS | 33 | -2.37 | #1,107 | #93,442 |
| 2006 | CWS | 33 | -2.13 | #971 | #68,909 |
| 2007 | PHI | 11 | -2.04 | #585 | #55,644 |
| 2008 | DET | 3 | -2.06 | #590 | #59,535 |
| 2009 | CWS | 9 | -2.10 | #571 | #64,315 |
| 2010 | CWS | 28 | -2.30 | #1,101 | #87,710 |
| 2011 | NYY | 26 | -2.28 | #1,150 | #85,549 |
| 2012 | NYY | 30 | -2.16 | #955 | #73,481 |
| 2013 | BAL | 17 | -2.37 | #1,203 | #93,020 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1999 | SEA | 33 | 5.94 | #44 | #4,191 |
| 2000 | SEA | 21 | 2.70 | #114 | #9,733 |
| 2001★ | SEA | 34 | 11.61 | #5 | #625 |
| 2002 | SEA | 34 | 5.64 | #57 | #4,555 |
| 2003 | SEA | 33 | 3.76 | #96 | #7,562 |
| 2004 | SEA | 31 | 8.07 | #28 | #2,184 |
| 2005 | CWS | 33 | 6.27 | #47 | #3,844 |
| 2006 | CWS | 33 | 6.14 | #55 | #3,977 |
| 2007 | PHI | 11 | -2.37 | #498 | #37,116 |
| 2008 | DET | 3 | -1.43 | #346 | #26,114 |
| 2009 | CWS | 9 | -0.12 | #246 | #18,956 |
| 2010 | CWS | 28 | 0.94 | #179 | #14,841 |
| 2011 | NYY | 26 | 2.73 | #120 | #9,662 |
| 2012 | NYY | 30 | -0.76 | #293 | #22,029 |
| 2013 | BAL | 17 | -0.50 | #272 | #20,733 |
★ Best season by Z