| 2013 | Engel Beltre (st) |
| 2012 | Engel Beltre (st) |
| 2011 | Engel Beltre (st) |
| 2010 | Andy Hawkins (bullpen coach) |
| 2009 | Greg Golson (st) |
| 2008 | Kameron Loe |
| 2007 | Kameron Loe |
| 2006 | Kameron Loe |
| 2005 | Vladimir Nunez (st), Kameron Loe (May 6 onwards) |
| 2004 | Jeff Nelson |
| 2003 | Esteban Yan, Tony Mounce (Jul 19 & 20) |
| 2002 | Steve Woodard (st), Butch Wynegar (Aug 2-Aug 5) |
| 2001 | Mike Venafro |
| 2000 | Mike Venafro |
| 1999 | Mike Venafro |
| 1998 | Al Levine |
| 1997 | |
| 1996 | |
| 1995 | |
| 1994 | |
| 1993 | |
| 1992 | Scott Chiamparino |
| 1991 | Scott Chiamparino |
| 1990 | Scott Chiamparino |
| 1989 | Wilson Alvarez |
| 1988 | Ed Vande Berg |
| 1987 | |
| 1986 | Kevin Brown |
| 1985 | |
| 1984 | Donnie Scott |
| 1983 | Donnie Scott |
| 1982 | |
| 1981 | |
| 1980 | Don Kainer |
| 1979 | |
| 1978 | Greg Mahlberg |
| 1977 | |
| 1976 | Joe Hoerner |
| 1975 | |
| 1974 | |
| 1973 | |
| 1972 | |
Washington Senators Years |
|
| 1971 | George Susce (coach) |
| 1970 | George Susce (coach) |
| 1969 | George Susce (coach) |
| 1968 | Bobby Hoffman (coach) |
| 1967 | George Susce (coach) |
| 1966 | George Susce (coach) |
| 1965 | George Susce (coach) |
| 1964 | George Susce (coach) |
| 1963 | George Susce (coach) |
| 1962 | George Susce (coach) |
| 1961 | George Susce (coach) |
Recent Comments