James Eugene O'Brien is an American former professional football player who was a placekicker and wide receiver in the National Football League (NFL). O'Brien played for the Baltimore Colts from 1970 to 1972 and the Detroit Lions in 1973. O'Brien is best remembered for kicking the game-winning field goal in the final seconds of Super Bowl V, making him the first of only three placekickers to accomplish such a feat.

Super Bowl V was an American football game played between the American Football Conference (AFC) champion Baltimore Colts and the National Football Conference (NFC) champion Dallas Cowboys to determine the National Football League (NFL) champion for the 1970 season. It was the fifth edition of the Super Bowl and the first modern-era NFL championship game. The Colts defeated the Cowboys by the score of 16–13 on a field goal with 5 seconds left in the game. The game was played on January 17, 1971, at the Orange Bowl in Miami, Florida, and was the first Super Bowl game played on artificial turf; specifically, the game was played on a Poly-Turf surface.