Antonio Rafael Armas Machado (born July 2, 1953 in Puerto Píritu, Anzoátegui State, Venezuela), was a popular hitter and one of Major League Baseball's top sluggers of the 1980s. Twice an All-Star, Armas played 14 seasons with the Pittsburgh Pirates, Oakland Athletics, Boston Red Sox, and California Angels, compiling a .252 batting average with 251 home runs and 815 runs batted in. Armas was prone to injuries that affected his career. In his major league career, Armas went to the disabled list 12 times, missing 302 games.
Armas started as an outfielder with Pittsburgh in 1976. The following year he was traded to Oakland. In his first three seasons with the Athletics, Armas was on the disabled list many times, and only managed to play 289 games. Armas finally played a full season in 1980, and hit .279 with 35 home runs and 109 RBI in 158 games.
Armas was named the American League Player of the Year by The Sporting News in 1981, a season in which he led the American League in home runs and games. In 1982, Armas set a pair of ML records for a right fielder with 11 putouts and 12 total chances against the Toronto Blue Jays. Later that year, he was traded to the Red Sox for Carney Lansford.