Daisuke Matsuzaka career ERA
4.45Career Regular Season
Daisuke Matsuzaka has a career ERA of 4.45 over 8 regular seasons.
- Best season on file: 2.90 in 2008.
- Most recent: 3.89 in 2014.
Average of 8 regular seasons, 2007 through 2014. 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 | 32 | 15 | 12 | 4.40 | 204.2 | 201 | 80 | 1.32 | 0 |
| 2008 | BOS | 29 | 18 | 3 | 2.90 | 167.2 | 154 | 94 | 1.32 | 0 |
| 2009 | BOS | 12 | 4 | 6 | 5.76 | 59.1 | 54 | 30 | 1.87 | 0 |
| 2010 | BOS | 25 | 9 | 6 | 4.69 | 153.2 | 133 | 74 | 1.37 | 0 |
| 2011 | BOS | 8 | 3 | 3 | 5.30 | 37.1 | 26 | 23 | 1.47 | 0 |
| 2012 | BOS | 11 | 1 | 7 | 8.28 | 45.2 | 41 | 20 | 1.71 | 0 |
| 2013 |  NYM | 7 | 3 | 3 | 4.42 | 38.2 | 33 | 16 | 1.24 | 0 |
| 2014 | NYM | 34 | 3 | 3 | 3.89 | 83.1 | 78 | 50 | 1.34 | 1 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV