Watch Bryce Harper's 424-foot walkoff homer

Washington Nationals star Bryce Harper hit the fourth walkoff home run of his career Sunday at Nationals Park, lifting the Nats to a 6-4 win over the Philadelphia Phillies.

The Phillies scored one run in the top of the ninth to break a 3-3 tie, but Joaquin Benoit walked Washington's Chris Heisey and allowed a single to Adam Eaton before Harper ended the game with the blast to center.