Danny Duffy ERA in 2021
2.512021 Regular Season
Danny Duffy posted a 2.51 ERA in the 2021 regular season.
- 2nd-best of Danny Duffy's 11 seasons on file; the best is 1.85 in 2013.
- Down 2.44 from 4.95 in 2020.
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. | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 2011 |  KC | 20 | 4 | 8 | 5.64 | 105.1 | 87 | 51 | 1.61 | 0 |
| 2012 | KC | 6 | 2 | 2 | 3.90 | 27.2 | 28 | 18 | 1.59 | 0 |
| 2013 | KC | 5 | 2 | 0 | 1.85 | 24.1 | 22 | 14 | 1.36 | 0 |
| 2014 | KC | 31 | 9 | 12 | 2.53 | 149.1 | 113 | 53 | 1.11 | 0 |
| 2015 | KC | 30 | 7 | 8 | 4.08 | 136.2 | 102 | 53 | 1.39 | 1 |
| 2016 | KC | 42 | 12 | 3 | 3.51 | 179.2 | 188 | 42 | 1.14 | 0 |
| 2017 | KC | 24 | 9 | 10 | 3.81 | 146.1 | 130 | 41 | 1.26 | 0 |
| 2018 | KC | 28 | 8 | 12 | 4.88 | 155.0 | 141 | 70 | 1.49 | 0 |
| 2019 | KC | 23 | 7 | 6 | 4.34 | 130.2 | 115 | 46 | 1.31 | 0 |
| 2020 | KC | 12 | 4 | 4 | 4.95 | 56.1 | 57 | 22 | 1.33 | 0 |
| 2021 | KC | 13 | 4 | 3 | 2.51 | 61.0 | 65 | 22 | 1.21 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV