| 2024 | Blake Taylor (st) |
| 2023 | Kyle Cody (st) |
| 2022 | AJ Alexy (st, Jul 15 – Sep 12) |
| 2021 | Joe Palumbo (st), AJ Alexy (Aug 30 – Sep 28) |
| 2020 | Joe Palumbo (st, Jul 26 & Aug 1) |
| 2019 | Joe Palumbo (st, Jun 8 – Sep 27) |
| 2018 | Jose LeClerc |
| 2017 | Jimmy Reyes (st), Jose LeClerc |
| 2016 | Jose LeClerc (st, Jul 6 onward) |
| 2015 | Jorge Alfaro (st) |
| 2014 | Armando Rodriguez (st), Jon Edwards (Aug 15 – Sep 19) |
| 2013 | Evan Meek (st) |
| 2012 | Wilmer Font (st) |
| 2011 | Wilmer Font (st) |
| 2010 | Michael Kirkman (st, Aug 21 onward) |
| 2009 | Guillermo Moscoso (st) |
| 2008 | Chris Davis (st, Jun 26 onward) |
| 2007 | Omar Beltre (st) |
| 2006 | Keith McDonald (st) |
| 2005 | Kameron Loe (st) |
| 2004 | Jeff Smith (st) |
| 2003 | Mario Ramos (st) |
| 2002 | Colby Lewis (st) |
| 2001 | |
| 2000 | Carlos Pena (st) |
| 1999 | Mike Venafro (st), Don Kalkstein (coach) |
| 1998 | |
| 1997 | Doug Witt (bullpen catcher) |
| 1996 | Doug Witt (bullpen catcher) |
| 1995 | Doug Witt (bullpen catcher) |
| 1994 | Doug Witt (bullpen catcher) |
| 1993 | Benji Gil (st), Doug Witt (bullpen catcher) |
| 1992 | Benji Gil (st), Doug Witt (bullpen catcher) |
| 1991 | Tony Scruggs (st) |
| 1990 | Mike Villa (st) |
| 1989 | Jack Daugherty (st) |
| 1988 | |
| 1987 | |
| 1986 | Mike Stanley (st) |
| 1985 | Javier Ortiz (st) |
| 1984 | |
| 1983 | |
| 1982 | |
| 1981 | |
| 1980 | |
| 1979 | |
| 1978 | |
| 1977 | |
| 1976 | |
| 1975 | |
| 1974 | Roy Howell (st) |
| 1973 | |
| 1972 | |
Washington Senators Years |
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| 1971 | |
| 1970 | Fred Klages (st) |
| 1969 | |
| 1968 | |
| 1967 | |
| 1966 | |
| 1965 | |
| 1964 | Walt Holloway (st) |
| 1963 | |
| 1962 | |
| 1961 | |
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