Robert David O'Brien (June 22, 1917 – November 18, 1977) was an American football quarterback in the National Football League for the Philadelphia Eagles. He played college football at Texas Christian University and was drafted in the first round (fourth overall) of the 1939 NFL Draft. In 1938, O'Brien won the Heisman Trophy and the Maxwell Award. The Davey O'Brien Award, given annually to the best quarterback in collegiate football, is named for him.