P · 16 seasons · 2007 – 2022 · B/T: R/R
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 2007 | NYY | 6 | -2.01 | #562 | #52,482 |
| 2008★ | WSH | 2 | -1.96 | #540 | #50,261 |
| 2009 | WSH | 41 | -2.34 | #1,144 | #91,365 |
| 2010 | WSH | 78 | -2.05 | #552 | #58,356 |
| 2011 | WSH | 72 | -2.18 | #1,052 | #74,881 |
| 2012 | WSH | 74 | -2.13 | #610 | #68,950 |
| 2013 | WSH | 72 | -2.10 | #589 | #63,950 |
| 2014 | WSH | 75 | -2.07 | #591 | #59,932 |
| 2015 | OAK | 69 | -2.09 | #998 | #63,319 |
| 2016 | ARI | 69 | -2.02 | #590 | #54,574 |
| 2017 | NYY | 67 | -2.07 | #594 | #61,344 |
| 2018 | TOR | 73 | -2.08 | #600 | #61,934 |
| 2019 | CLE | 53 | -2.07 | #603 | #60,853 |
| 2020 | MIN | 26 | -2.06 | #508 | #58,623 |
| 2021 | ARI | 26 | -1.98 | #625 | #50,717 |
| 2022 | WSH | 4 | -2.02 | #580 | #53,599 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 2007 | NYY | 6 | -2.04 | #428 | #32,167 |
| 2008 | WSH | 2 | -2.03 | #445 | #31,979 |
| 2009 | WSH | 41 | 2.13 | #129 | #11,177 |
| 2010 | WSH | 78 | 4.30 | #79 | #6,586 |
| 2011 | WSH | 72 | 5.21 | #63 | #5,155 |
| 2012★ | WSH | 74 | 5.57 | #53 | #4,646 |
| 2013 | WSH | 72 | 3.85 | #96 | #7,413 |
| 2014 | WSH | 75 | 3.78 | #98 | #7,516 |
| 2015 | OAK | 69 | 4.89 | #75 | #5,622 |
| 2016 | ARI | 69 | 1.41 | #173 | #13,299 |
| 2017 | NYY | 67 | 0.56 | #237 | #16,176 |
| 2018 | TOR | 73 | 2.88 | #138 | #9,326 |
| 2019 | CLE | 53 | 2.54 | #148 | #10,136 |
| 2020 | MIN | 26 | 2.78 | #138 | #9,561 |
| 2021 | ARI | 26 | 0.31 | #287 | #17,083 |
| 2022 | WSH | 4 | -2.41 | #709 | #37,644 |
★ Best season by Z