William Patrick Cronin (December 26, 1902 – October 26, 1966) was an American professional baseball player and manager.

He threw and batted right-handed and was listed as 5 feet 9 inches (1.75 m) tall and 167 pounds (76 kg).

Over parts of four seasons with Boston, he collected 68 hits, including 15 doubles and two triples, in 126 games played.

[5] In 1930 and 1931, he served as the primary backup catcher to regular Al Spohrer.

For most of the rest of that decade, Cronin toiled in the top-level Pacific Coast League.