In a five-season career, Boyer posted a 20-23 record with 198 strikeouts and a 4.73 earned run average in 395⅔ innings pitched, including 13 complete games, three shutouts, and two saves. Boyer also played for the Duluth Dukes, a Cardinals minor league team, in 1947. During the 1947 season in Duluth, Boyer compiled a record of 16 wins against 9 losses. He struck out 239 and took the strikeout lead in the Northern League. After that season, he was sold to the Houston Buffs, for whom he played in 1948.
After his playing career, Boyer became a scout, minor league pitching instructor and major league pitching coach—spending much of his time in the New York Yankees organization. He was the pitching coach during Bobby Cox's first term as manager of the Atlanta Braves. Boyer is credited with helping Fritz Peterson become a star pitcher.