P · 6 seasons · 2012 – 2017 · B/T: L/L
One category carried Robbie Ross and the rest pulled him back: +0.1 from ERA, against a career total of -4.6. The peak came in 2012, +1.9, 145th that season and 11854th of 51,303 player-seasons on record. The value came from ERA (+0.1). It leaked back out through WHIP (-1.9), strikeouts (-0.9) and saves (-0.7).
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 2012 | TEX | 58 | -2.16 | #947 | #73,018 |
| 2013 | TEX | 65 | -2.10 | #589 | #63,980 |
| 2014 | TEX | 27 | -2.10 | #983 | #64,706 |
| 2015 | BOS | 54 | -2.05 | #594 | #57,954 |
| 2016★ | BOS | 54 | -2.02 | #590 | #54,602 |
| 2017 | BOS | 8 | -2.07 | #594 | #61,375 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 2012★ | TEX | 58 | 1.91 | #145 | #11,854 |
| 2013 | TEX | 65 | 0.46 | #228 | #16,549 |
| 2014 | TEX | 27 | -4.90 | #688 | #50,902 |
| 2015 | BOS | 54 | -0.11 | #267 | #18,925 |
| 2016 | BOS | 54 | 0.54 | #226 | #16,279 |
| 2017 | BOS | 8 | -2.52 | #613 | #39,455 |
★ Best season by Z