Robert Charles Keegan (August 4, 1920 – June 20, 2001) was an American right-handed pitcher in Major League Baseball for the Chicago White Sox from 1953 to 1958.

He was 32 years old when he made the 1953 White Sox' varsity roster, and in his sophomore season, 1954, he was selected to the American League All-Star team.

In the game, played July 13 at Cleveland Stadium, Keegan started the eighth inning in relief with the Junior Circuit ahead, 8–7.

He struck out Roy Campanella, but then gave up a pinch hit home run to Gus Bell to put the Nationals ahead, 9–8.

His replacement, left-hander Dean Stone, never threw an official pitch, but picked off Schoendienst as he attempted to steal home for the third out.