Ethan Nathan Allen (January 1, 1904 – September 15, 1993) was an American center fielder in Major League Baseball from 1926 to 1938.

During his time at UC, Allen was a star athlete in track and field, basketball, and baseball.

In 1935, he finished 17th in MVP voting with a batting average of .307 and a league-leading 156 games played.

Defensively, Allen posted a .981 fielding percentage at all three outfield positions in his career.

Allen remained well-known long after his retirement as a player as the inventor of the Cadaco-Ellis board game All Star Baseball, which entered production in the early 1940s and remains available into the 21st century, with few changes having been made.