Frank Robinson -- a Baltimore Orioles superstar and MLB's first-ever black manager -- died at 83 on Wednesday ... Major League Baseball confirmed.
Robinson was one of the greatest hitters in the game's history ... playing 21 seasons and batting .294 with 2,943 hits and 586 home runs.
The Hall of Famer's resume is legendary -- he was a 2-time MVP, a 2-time World Series winner, the MLB's Rookie of the Year in 1956 ... AND a triple-crown winner in 1966.
Before his playing days ended ... he was named player-manager of the Indians in 1975 -- making him the MLB's first-ever black manager.