Robert David O'Brien (June 22, 1917 – November 18, 1977) was an American football quarterback.
He played college football at Texas Christian University (TCU) and professionally in the National Football League (NFL) with the Philadelphia Eagles for two seasons.
In 1938, O'Brien won the Heisman Trophy and the Maxwell Award, and was the fourth overall pick of the 1939 NFL draft.
O'Brien was inducted into the College Football Hall of Fame in 1955.
Since 1981, the Davey O'Brien Award is given annually to the best quarterback in college football.