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 originally from Rochester, New York.

Keegan attended Bucknell University before becoming a White Sox in his early 30's. In 1954 he made the American League All-Star Team. That year, he went 16–9 with 3.09 ERA in over 200 innings pitched. His 14 complete games that year was 9th in the league. On August 20, 1957, he did no-hit the Washington Senators in the second game of a doubleheader at Comiskey Park. He retired in 1958 after going 40–36 through his whole career.

He was signed by Yankees scout Lou Maguolo.