He and Carmelo Martinez were dubbed the M&M Boys on the 1984 San Diego Padres team that reached the first World Series in franchise history. McReynolds shared the team lead with 20 home runs, while Martinez had 66 RBIs. Perhaps McReynolds best season was 1988 with the Mets. McReynolds tied his career high in batting average (.288) and set career highs in RBIs (99) and stolen bases (21). He also had 27 home runs. McReynolds finished third in National League MVP voting behind winner Kirk Gibson and Met teammate Darryl Strawberry. He once held the major league record for most stolen bases in a season (21 in 1988) without being caught. This record was broken by Chase Utley, whose stole 23 bases without being caught in 2009.
A 1978 Sylvan Hills High School graduate, the former Bear developed the Kevin McReynolds Sports Complex near his former high school.