Froemming worked in five World Series: 1976, 1984, 1988, 1990 (Games 3–4) and 1995. He umpired in the League Championship Series in 1973, 1977, 1980, 1982, 1985, 1989, 1991, 1993, 1997 and 2000, all in the NL. With his tenth appearance in the LCS in 2000, he broke the record he had previously shared with Doug Harvey; Jerry Crawford tied the record in 2003, and broke it with his 11th LCS in 2005. (Froemming and Crawford share the record of 10 NLCS, as two of Crawford's 12 were in the American League.)