Brett Anderson ERA in 2021
4.222021 Regular Season
Brett Anderson posted a 4.22 ERA in the 2021 regular season.
- 9th-best of Brett Anderson's 13 seasons on file; the best is 2.57 in 2012.
- Up 0.01 from 4.21 in 2020.
Average of 13 regular seasons, 2009 through 2021. 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. | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 2009 |  ATH | 30 | 11 | 11 | 4.06 | 175.1 | 150 | 45 | 1.28 | 0 |
| 2010 | ATH | 19 | 7 | 6 | 2.80 | 112.1 | 75 | 22 | 1.19 | 0 |
| 2011 | ATH | 13 | 3 | 6 | 4.00 | 83.1 | 61 | 25 | 1.33 | 0 |
| 2012 | ATH | 6 | 4 | 2 | 2.57 | 35.0 | 25 | 7 | 1.03 | 0 |
| 2013 | ATH | 16 | 1 | 4 | 6.04 | 44.2 | 46 | 21 | 1.61 | 3 |
| 2014 |  COL | 8 | 1 | 3 | 2.91 | 43.1 | 29 | 13 | 1.32 | 0 |
| 2015 |  LAD | 31 | 10 | 9 | 3.69 | 180.1 | 116 | 46 | 1.33 | 0 |
| 2016 | LAD | 4 | 1 | 2 | 11.91 | 11.1 | 5 | 4 | 2.56 | 0 |
| 2017 |  CHC/TOR | 13 | 4 | 4 | 6.34 | 55.1 | 38 | 21 | 1.70 | 0 |
| 2018 | ATH | 17 | 4 | 5 | 4.48 | 80.1 | 47 | 13 | 1.28 | 0 |
| 2019 | ATH | 31 | 13 | 9 | 3.89 | 176.0 | 90 | 49 | 1.31 | 0 |
| 2020 |  MIL | 11 | 4 | 4 | 4.21 | 47.0 | 32 | 10 | 1.28 | 0 |
| 2021 | MIL | 24 | 4 | 9 | 4.22 | 96.0 | 58 | 28 | 1.35 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV