DENVER - Nolan Arenado hit a walk-off home run in the 10th inning to lead the Rockies over San Diego Friday night.
Arenado sent a 1-1 pitch from reliever Joe Thatcher (2-1) over the wall in left field to lift Colorado, which had squandered a six-run lead.
Matt Belisle (4-2) pitched two scoreless innings to earn the win.
Carlos Gonzalez had two triples and drove in three runs before leaving with an apparent left ankle injury in the seventh. Dexter Fowler returned to the lineup after sitting out with a migraine and finished with three hits. Todd Helton drove in three runs.
The Padres trailed by six runs early in the game and 9-4 heading into the seventh. Chase Headley began the inning when he was hit by Rob Scahill, possibly as retaliation for when starter Edinson Volquez plunked Troy Tulowitzki in the second.