| 2024 | Derek Hill (May 21 – Jul 19), Sandro Fabian (Sep 6 – 25) |
| 2023 | |
| 2022 | Greg Holland (until Apr 16), Steele Walker (Jun 5 – 10) |
| 2021 | Nick Vincent (st) |
| 2020 | Juan Nicasio (st, Aug 16 – 17), Alex Speas (st2) |
| 2019 | Matt Davidson (st) |
| 2018 | Bartolo Colon |
| 2017 | Brad Holman (Bullpen coach) |
| 2016 | Brad Holman (Bullpen coach) |
| 2015 | Andy Hawkins (Bullpen coach) |
| 2014 | Andy Hawkins (Bullpen coach) |
| 2013 | Andy Hawkins (Bullpen coach) |
| 2012 | Andy Hawkins (Bullpen coach) |
| 2011 | Andy Hawkins (Bullpen coach) |
| 2010 | Rich Harden |
| 2009 | Andy Hawkins (Bullpen coach) |
| 2008 | John Mayberry (st), Andy Hawkins (Pitching coach; Aug 2 onward) |
| 2007 | Akinori Otsuka (until Jul 1) |
| 2006 | Akinori Otsuka (until Sep 19) |
| 2005 | Carlos Almanzar (until Apr 30), Edinson Volquez (Aug 30 onward) |
| 2004 | Glendon Rusch (st), Carlos Almanzar (Apr 6 – Sep 21) |
| 2003 | Rudy Seanez (st) |
| 2002 | Rudy Seanez |
| 2001 | Jeff Brantley (st), Bobby Cuellar (coach) |
| 2000 | Matt Perisho |
| 1999 | Matt Perisho (st, Sep 4 onward), Ryan Glynn (May 16 – Jun 9) |
| 1998 | Matt Perisho (Jun 16 – 21) |
| 1997 | |
| 1996 | Jeff Russell (st, May 1 onward) |
| 1995 | Jose Reyes (st replacement), Jeff Russell (Apr 28 onward) |
| 1994 | Rick Honeycutt (until Aug 8) |
| 1993 | Rob Ducey (st) |
| 1992 | Jeff Russell (until Aug 26) |
| 1991 | Jeff Russell |
| 1990 | Jeff Russell |
| 1989 | Jeff Russell |
| 1988 | Jeff Russell |
| 1987 | Jeff Russell (st, May 15 onward) |
| 1986 | Jeff Russell (st, Jun 10 onward) |
| 1985 | Tommy Boggs (until May 7), Jeff Russell (Aug 8 onward) |
| 1984 | Pat Underwood (st) |
| 1983 | Rick Honeycutt (until Aug 14) |
| 1982 | Rick Honeycutt |
| 1981 | Darrell Johnson (coach) |
| 1980 | Jim Umbarger (st) |
| 1979 | Jim Umbarger (st) |
| 1978 | Jim Schaffer (st, coach), Jim Umbarger |
| 1977 | Jim Umbarger (Sep 13 onward) |
| 1976 | Jim Umbarger |
| 1975 | Art Fowler (coach, st), Jim Umbarger |
| 1974 | Art Fowler (coach, st), Pete Broberg |
| 1973 | Whitey Herzog (Manager) |
| 1972 | Joe Camacho (bench coach) |
Washington Senators Years |
|
| 1971 | Joe Camacho (bench coach) |
| 1970 | Joe Camacho (bench coach) |
| 1969 | Joe Camacho (bench coach) |
| 1968 | Jim Lemon (mgr) |
| 1967 | |
| 1966 | |
| 1965 | Sid Hudson (coach) |
| 1964 | Sid Hudson (coach) |
| 1963 | Sid Hudson (coach) |
| 1962 | Sid Hudson (coach) |
| 1961 | Sid Hudson (coach) |
Number 40, Texas Rangers 1972: Joe Camacho
Just realized I never said thank you for this. So..
Thanks! Always looking for more info I don’t have, and at the time you posted that, I didn’t have it. :)