William Morley "Jopsey" Jennings (January 23, 1890 – May 13, 1985) was an American football, basketball, and baseball player, coach, and college athletics administrator.

Jennings attended college at Mississippi State University in Starkville, at which he participated in baseball, basketball, football, and track.

He was also the head baseball coach at Baylor from 1928 to 1939, where he tallied a mark of 120–79.

From 1941 to 1951, Jennings served as the athletic director at Texas Tech University in Lubbock.

[1] He was inducted into the College Football Hall of Fame as a coach in 1973.