William Joseph Sullivan Jr. (October 23, 1910 – January 4, 1994) was an American professional baseball player.

He played in Major League Baseball as a catcher, first baseman and third baseman with the Chicago White Sox, Cincinnati Reds, Cleveland Indians, St. Louis Browns, Detroit Tigers, Brooklyn Dodgers and the Pittsburgh Pirates between 1931 and 1947.

[1] Sullivan was born in Chicago, Illinois and attended the University of Notre Dame where he played for the Notre Dame Fighting Irish baseball team in 1930 and 1931.

[1] In twelve major league seasons, Sullivan played in 962 Games and had 2,840 At Bats, 346 Runs, 820 Hits, 152 Doubles, 32 Triples, 29 Home Runs, 388 RBI, 30 Stolen Bases, 240 Walks, .289 Batting Average, .346 On-base percentage, .395 Slugging Percentage, 1,123 Total Bases and 39 Sacrifice Hits.

[1] Sullivan led National League catchers in 1938 with a .990 fielding percentage.