| 2025 | |
| 2024 | Kirby Yates |
| 2023 | Yoshi Tsutsugo (st) |
| 2022 | Kolby Allard |
| 2021 | Kolby Allard |
| 2020 | Kolby Allard (st, Aug 2 onward) |
| 2019 | Jason Hammel (st), Kolby Allard (Aug 9 – Sep 25) |
| 2018 | Dan Warthen (Asst Pitching Coach) |
| 2017 | Dario Alvarez (until Jun 28) |
| 2016 | Ike Davis (st), Dario Alvarez (Jul 29 onward) |
| 2015 | Thomas Field (st, May 11 – 27) |
| 2014 | Daniel McCutchen (Apr 4 only), Ben Rowen (st, Jun 15 – Jul 3) |
| 2013 | Jeff Beliveau (st) |
| 2012 | Scott Feldman |
| 2011 | Scott Feldman (st, Jul 22 onward) |
| 2010 | Scott Feldman |
| 2009 | Scott Feldman |
| 2008 | Scott Feldman |
| 2007 | Scott Feldman |
| 2006 | Scott Feldman |
| 2005 | Pedro Astacio (until Jun 14), James Baldwin (Jul 23 – Aug 11), Scott Feldman (Aug 16 – 18 dnp, Aug 31 onward) |
| 2004 | Jay Powell (until Jun 4) |
| 2003 | Jay Powell (until Sep 20) |
| 2002 | Jay Powell (st, Jun 11 onward) |
| 2001 | Aaron Myette (st, May 12 onward) |
| 2000 | Jason McDonald (st), B.J. Waszgis (Jul 29 onward) |
| 1999 | Roberto Kelly |
| 1998 | Roberto Kelly |
| 1997 | Scott Bailes (st) |
| 1996 | Mike Henneman |
| 1995 | Toby Nivens (st replacement), Bob Tewksbury (until Sep 20) |
| 1994 | Rick Reed (until May 9), Duff Brumley (Jun 1 – 6) |
| 1993 | Rob Maurer (st), Rick Reed (Sep 3 – 11) |
| 1992 | Rob Maurer (st, Sep 18 onward) |
| 1991 | Rob Maurer (st, Sep 8 onward) |
| 1990 | Jamie Moyer |
| 1989 | Jamie Moyer |
| 1988 | Paul Kilgus |
| 1987 | Paul Kilgus (st, Jun 7 onward) |
| 1986 | |
| 1985 | Nick Capra (Jun 20 – Jul 5) |
| 1984 | |
| 1983 | |
| 1982 | |
| 1981 | Jack Lazorko (st) |
| 1980 | |
| 1979 | Gary Holle (st, Jun 2 – 14) |
| 1978 | Len Barker |
| 1977 | Len Barker (st, Jul 2 onward) |
| 1976 | Jim Gideon (st), Len Barker (Sep 4 & Oct 3) |
| 1975 | Rick Waits (st) |
| 1974 | Rick Waits (st) |
| 1973 | Pete Mackanin (st) |
| 1972 | |
Washington Senators Years |
|
| 1971 | Richie Scheinblum (until May 16) |
| 1970 | Kris Krebs (st) |
| 1969 | Mike Thompson (st) |
| 1968 | Rick Hense (st) |
| 1967 | Frank Coggins (st) |
| 1966 | Dave Hirtz (st) |
| 1965 | Nick Willhite (st) |
| 1964 | Carl Bouldin (st) |
| 1963 | Louis Piniella (st, Yes THAT one!), Jim Bronstad (Apr 13 – Jun 28), Carl Bouldin (Apr 14 – May 4, Sep 11 – 27) |
| 1962 | Jack Jenkins (st) |
| 1961 | |
Roy Campanella wore #39 with the brooklyn dodgers