| By Year | By Lowest ERA | BY Member | ||||||||
| Year | Name | ERA | Year | Name | ERA | Year | Name | ERA | ||
| 2008 | Vilmer Jason | 0.46 | 2001 | Jockish Mike | 0.00 | 1996 | Braden Dan | 0.29 | ||
| 2007 | Vilmer Jason | 0.60 | 1999 | Jockish Mike | 0.00 | 1984 | Brinker Tom | 0.00 | ||
| 2006 | Koenig Chuck | 0.85 | 1985 | Kleen Bob | 0.00 | 2005 | Eller Bob | 0.74 | ||
| 2005 | Eller Bob | 0.74 | 1984 | Brinker Tom | 0.00 | 1993 | Greaves Jeff | 0.30 | ||
| 2004 | Jockish Mike | 0.09 | 1984 | Kleen Bob | 0.00 | 1974 | Herman Cal | 0.09 | ||
| 2003 | Jockish Mike | 0.13 | 2002 | Jockish Mike | 0.03 | 2001 | Jockish Mike | 0.00 | ||
| 2002 | Jockish Mike | 0.03 | 1991 | Johnson Don | 0.07 | 1999 | Jockish Mike | 0.00 | ||
| 2001 | Jockish Mike | 0.00 | 1990 | Johnson Don | 0.08 | 2002 | Jockish Mike | 0.03 | ||
| 2000 | Jockish Mike | 0.20 | 2004 | Jockish Mike | 0.09 | 2004 | Jockish Mike | 0.09 | ||
| 1999 | Jockish Mike | 0.00 | 1976 | Smith Bert | 0.09 | 2003 | Jockish Mike | 0.13 | ||
| 1998 | Jockish Mike | 0.15 | 1974 | Herman Cal | 0.09 | 1998 | Jockish Mike | 0.15 | ||
| 1997 | Kobler Tim | 0.10 | 1997 | Kobler Tim | 0.10 | 2000 | Jockish Mike | 0.20 | ||
| 1996 | Braden Dan | 0.29 | 1982 | Weida Vern | 0.11 | 1991 | Johnson Don | 0.07 | ||
| 1995 | Kobler Tim | 0.19 | 1987 | Wisely Curt | 0.12 | 1990 | Johnson Don | 0.08 | ||
| 1994 | Mayer Terry | 0.21 | 1983 | Kleen Bob | 0.12 | 1992 | Johnson Don | 0.23 | ||
| 1993 | Johnson Don | 0.30 | 2003 | Jockish Mike | 0.13 | 1993 | Johnson Don | 0.30 | ||
| 1993 | Greaves Jeff | 0.30 | 1989 | Moran Bob | 0.13 | 1985 | Kleen Bob | 0.00 | ||
| 1992 | Johnson Don | 0.23 | 1973 | Smith Bert | 0.14 | 1984 | Kleen Bob | 0.00 | ||
| 1991 | Johnson Don | 0.07 | 1998 | Jockish Mike | 0.15 | 1983 | Kleen Bob | 0.12 | ||
| 1990 | Johnson Don | 0.08 | 1975 | Smith Bert | 0.17 | 1997 | Kobler Tim | 0.10 | ||
| 1989 | Moran Bob | 0.13 | 1988 | Wisely Curt | 0.18 | 1995 | Kobler Tim | 0.19 | ||
| 1988 | Wisely Curt | 0.18 | 1995 | Kobler Tim | 0.19 | 2006 | Koenig Chuck | 0.85 | ||
| 1987 | Wisely Curt | 0.12 | 1978 | Poinsett Carl | 0.19 | 1994 | Meyer Terry | 0.21 | ||
| 1986 | Wolf Rick | 0.22 | 2000 | Jockish Mike | 0.20 | 1989 | Moran Bob | 0.13 | ||
| 1985 | Kleen Bob | 0.00 | 1994 | Meyer Terry | 0.21 | 1978 | Poinsett Carl | 0.19 | ||
| 1984 | Kleen Bob | 0.00 | 1986 | Wolf Rick | 0.22 | 1981 | Scheer Phil | 0.39 | ||
| 1984 | Brinker Tom | 0.00 | 1992 | Johnson Don | 0.23 | 1976 | Smith Bert | 0.09 | ||
| 1983 | Kleen Bob | 0.12 | 1980 | Smith Bert | 0.26 | 1973 | Smith Bert | 0.14 | ||
| 1982 | Weida Vern | 0.11 | 1996 | Braden Dan | 0.29 | 1975 | Smith Bert | 0.17 | ||
| 1981 | Scheer Phil | 0.39 | 1993 | Greaves Jeff | 0.30 | 1980 | Smith Bert | 0.26 | ||
| 1980 | Smith Bert | 0.26 | 1993 | Johnson Don | 0.30 | 1977 | Smith Bert | 0.41 | ||
| 1979 | Weida Vern | 0.46 | 1981 | Scheer Phil | 0.39 | 1982 | Weida Vern | 0.11 | ||
| 1978 | Poinsett Carl | 0.19 | 1977 | Smith Bert | 0.41 | 1979 | Weida Vern | 0.46 | ||
| 1977 | Smith Bert | 0.41 | 2008 | Vilmer Jason | 0.46 | 2008 | Vilmer Jason | 0.46 | ||
| 1976 | Smith Bert | 0.09 | 1979 | Weida Vern | 0.46 | 2007 | Vilmer Jason | 0.60 | ||
| 1975 | Smith Bert | 0.17 | 2007 | Vilmer Jason | 0.60 | 1987 | Wisely Curt | 0.12 | ||
| 1974 | Herman Cal | 0.09 | 2005 | Eller Bob | 0.74 | 1988 | Wisely Curt | 0.18 | ||
| 1973 | Smith Bert | 0.14 | 2006 | Koenig Chuck | 0.85 | 1986 | Wolf Rick | 0.22 | ||
| 1972 | Unknown | x | 1972 | Unknown | x | 1972 | Unknown | x | ||