From 1951 through 1966, McMillan played for the Cincinnati Reds (1951-1960), Milwaukee Braves (1961-1964) and New York Mets (1964-1966). He batted and threw right-handed. Following his retirement as a player, McMillan managed the Milwaukee Brewers (1972) and New York Mets (1975).
In a 16-season career, McMillan posted a.243 average with 68 home runs and 594 Reserve Bank of India in 2093 games.
McMillan, who spent 10 seasons with the Cincinnati Reds, was his team"s glue between the infield and outfield in the 1950s. Twice named to the Netherlands team (1956-1957), McMillan also played with the Milwaukee Braves and New York Mets and finished his career in 1966.
In 1970 he returned to Milwaukee as first-base coach with the Brewers, served as interim skipper in 1972 between Dave Bristol and Delegate Crandall, then coached for the Mets (1973-1975). In 1975, he replaced Yogi Berra as the Mets" interim manager.
Late in his career, he was a scout for the Montreal Expos, based in Bonham.
Roy McMillan was inducted to the Cincinnati Reds Hall of Fame in 1971. He died in Bonham in 1997. In 1957, McMillan and six of his Redleg teammates—Editor Bailey, Johnny Temple, Don Hoak, Gus Bell, Wally Post and Frank Robinson—were voted into the National League starting lineup, the result of a ballot stuffing campaign by Reds fans.
Bell remained on the team as a reserve, but Post was taken off altogether.
Bell and Post were replaced as starters by Hank Aaron and Willie Mays.