Danny Duffy
2011–2021 · 11 seasons · Bats left, throws left · Born 1988
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Pitching
| Season | Team | Lg | G | GS | IP | W | L | SV | SO | BB | H | ER | ERA | WHIP | WAR | FIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2011 | Kansas City Royals | AL | 20 | 20 | 105.3 | 4 | 8 | 0 | 87 | 51 | 119 | 66 | 5.64 | 1.61 | -0.1 | 4.82 |
| 2012 | Kansas City Royals | AL | 6 | 6 | 27.7 | 2 | 2 | 0 | 28 | 18 | 26 | 12 | 3.90 | 1.59 | 0.3 | 3.96 |
| 2013 | Kansas City Royals | AL | 5 | 5 | 24.3 | 2 | 0 | 0 | 22 | 14 | 19 | 5 | 1.85 | 1.36 | 0.4 | 3.09 |
| 2014 | Kansas City Royals | AL | 31 | 25 | 149.3 | 9 | 12 | 0 | 113 | 53 | 113 | 42 | 2.53 | 1.11 | 1.0 | 3.83 |
| 2015 | Kansas City Royals | AL | 30 | 24 | 136.7 | 7 | 8 | 1 | 102 | 53 | 137 | 62 | 4.08 | 1.39 | 0.3 | 4.43 |
| 2016 | Kansas City Royals | AL | 42 | 26 | 179.7 | 12 | 3 | 0 | 188 | 42 | 163 | 70 | 3.51 | 1.14 | 2.0 | 3.83 |
| 2017 | Kansas City Royals | AL | 24 | 24 | 146.3 | 9 | 10 | 0 | 130 | 41 | 143 | 62 | 3.81 | 1.26 | 2.9 | 3.46 |
| 2018 | Kansas City Royals | AL | 28 | 28 | 155.0 | 8 | 12 | 0 | 141 | 70 | 161 | 84 | 4.88 | 1.49 | 0.5 | 4.70 |
| 2019 | Kansas City Royals | AL | 23 | 23 | 130.7 | 7 | 6 | 0 | 115 | 46 | 125 | 63 | 4.34 | 1.31 | 0.9 | 4.78 |
| 2020 | Kansas City Royals | AL | 12 | 11 | 56.3 | 4 | 4 | 0 | 57 | 22 | 53 | 31 | 4.95 | 1.33 | 0.4 | 4.75 |
| 2021 | Kansas City Royals | AL | 13 | 12 | 61.0 | 4 | 3 | 0 | 65 | 22 | 52 | 17 | 2.51 | 1.21 | 1.2 | 3.40 |
| Career | 11 seasons | 234 | 204 | 1172.3 | 68 | 68 | 1 | 1048 | 432 | 1111 | 514 | 3.95 | 1.32 | 9.7 | — | |
Hitting
| Season | Team | Lg | G | PA | AB | R | H | 2B | 3B | HR | RBI | BB | SO | SB | AVG | OBP | SLG | OPS | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2011 | Kansas City Royals | AL | 20 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | .000 | .000 | .000 | .000 | -0.1 |
| 2012 | Kansas City Royals | AL | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — |
| 2013 | Kansas City Royals | AL | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — |
| 2014 | Kansas City Royals | AL | 31 | 7 | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | .000 | .000 | .000 | .000 | -0.2 |
| 2015 | Kansas City Royals | AL | 30 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — |
| 2016 | Kansas City Royals | AL | 42 | 6 | 5 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | .200 | .200 | .200 | .400 | -0.1 |
| 2017 | Kansas City Royals | AL | 24 | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | .500 | .500 | .500 | 1.000 | 0.0 |
| 2018 | Kansas City Royals | AL | 28 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | .000 | .000 | .000 | .000 | -0.1 |
| 2019 | Kansas City Royals | AL | 23 | 4 | 4 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | .250 | .250 | .250 | .500 | 0.0 |
| 2020 | Kansas City Royals | AL | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — |
| 2021 | Kansas City Royals | AL | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — |
| Career | 11 seasons | 234 | 24 | 22 | 2 | 3 | 0 | 0 | 0 | 1 | 0 | 11 | 0 | .136 | .136 | .136 | .272 | -0.4 | |
The WAR columns are worked out on this site — they are not part of the source data, and they will not match Baseball-Reference exactly.
Everything else on this page comes straight from the Lahman database. WAR is our own calculation from those same season lines: fielding is estimated from putouts and assists rather than measured, fielding innings are missing before 1954, and the fielding component is capped. Treat it as a reasonable estimate of value, not as a record. The season tool explains the method in full.
— means the value is not in the source for that season, which is not the same as zero. In the Career and Subtotal rows it marks a statistic that cannot be added up across seasons — wOBA and FIP both need league constants that change every year, so we leave them blank rather than invent one. Leagues on this page: AL (American League).
Data for 1871 to 2025: Lahman Baseball Database 2025, compiled by SABR (Society for American Baseball Research) and licensed under CC BY-SA 3.0 Unported. Negro Leagues data licensed from Seamheads.com and included under SABR major-league recommendations (2021-02-11, 2024-06-03). The season lines on this page are our own derivative of that database — the WAR columns are computed here — and they are published under the same CC BY-SA 3.0 Unported licence, as ShareAlike requires. That database is published once a season is complete, so the 2026 figures on this site come from a different place: the MLB Stats API, whose notice reads “Copyright 2026 MLB Advanced Media, L.P. Use of any content on this page acknowledges agreement to the terms posted here http://gdx.mlb.com/components/copyright.txt”. Those numbers are MLB Advanced Media, L.P.’s, not SABR (Society for American Baseball Research)’s, and they carry that notice rather than the CC BY-SA 3.0 Unported licence above. Not affiliated with, endorsed by, or connected to Major League Baseball or any of its clubs.