Clay Buchholz career ERA
3.98Career Regular Season
Clay Buchholz has a career ERA of 3.98 over 13 regular seasons.
- Best season on file: 1.59 in 2007.
- Most recent: 6.56 in 2019.
Figures come from ESPN's box scores and were last read on September 22, 2026.
| GP: Games the player appeared in, however briefly. | W: Games in which this pitcher was credited with the win. | L: Games in which this pitcher was charged with the loss. | ERA: Earned runs allowed per nine innings pitched — lower is better. Under 3.00 is excellent. | IP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs. | K: Batters this pitcher struck out. | BB: Times the batter reached first base on four balls. | WHIP: Walks and hits allowed per inning pitched — lower is better. Around 1.00 is elite. | SV: Games finished by protecting a narrow lead to the last out. | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 2007 |  BOS | 4 | 3 | 1 | 1.59 | 22.2 | 22 | 10 | 1.06 | 0 |
| 2008 | BOS | 16 | 2 | 9 | 6.75 | 76.0 | 72 | 41 | 1.76 | 0 |
| 2009 | BOS | 16 | 7 | 4 | 4.21 | 92.0 | 68 | 36 | 1.38 | 0 |
| 2010 | BOS | 28 | 17 | 7 | 2.33 | 173.2 | 120 | 67 | 1.20 | 0 |
| 2011 | BOS | 14 | 6 | 3 | 3.48 | 82.2 | 60 | 31 | 1.29 | 0 |
| 2012 | BOS | 29 | 11 | 8 | 4.56 | 189.1 | 129 | 64 | 1.33 | 0 |
| 2013 | BOS | 16 | 12 | 1 | 1.74 | 108.1 | 96 | 36 | 1.02 | 0 |
| 2014 | BOS | 28 | 8 | 11 | 5.34 | 170.1 | 132 | 54 | 1.39 | 0 |
| 2015 | BOS | 18 | 7 | 7 | 3.26 | 113.1 | 107 | 23 | 1.21 | 0 |
| 2016 | BOS | 37 | 8 | 10 | 4.78 | 139.1 | 93 | 55 | 1.33 | 0 |
| 2017 |  PHI | 2 | 0 | 1 | 12.27 | 7.1 | 5 | 3 | 2.59 | 0 |
| 2018 |  ARI | 16 | 7 | 2 | 2.01 | 98.1 | 81 | 22 | 1.04 | 0 |
| 2019 |  TOR | 12 | 2 | 5 | 6.56 | 59.0 | 39 | 16 | 1.49 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV