Marvin Rotblatt (October 18, 1927 – July 16, 2013), nicknamed "Rotty", was a left-handed pitcher in Major League Baseball for the Chicago White Sox in the 1948, 1950 and 1951 seasons.

Listed at 5 feet 7 inches (1.70 m) tall, Rotblatt has been considered one of the shortest pitchers in Major League history.

As a result, in 1951 he appeared on You Bet Your Life, the television quiz show hosted by Groucho Marx, after being selected at an audition over his pitching teammate Bob Cain, who knew something about short players.

While pitching for the 1951 Detroit Tigers, Cain walked Eddie Gaedel, a 3 ft 6 in (1.07 m) pinch hitter signed by St. Louis Browns owner Bill Veeck, also a showman who enjoyed staging publicity stunts.

[5] In 1964, students at Carleton College in Northfield, Minnesota named an intramural slow-pitch softball league after Rotblatt.