Peoria, AZ (SportsNetwork.com) - Justin Upton hit a two-run homer in a three- run third inning as San Diego clipped Seattle by a 6-4 count in Cactus League action.

Matt Kemp finished 2-for-4 and drove in a run, with Clint Barmes adding an RBI for the Padres.

Andrew Cashner worked four innings for the win, allowing six hits and three runs while striking out four.

Seth Smith cracked a two-run shot and Endy Chavez knocked in a run for the Mariners.

J.A. Happ was pounded in the loss for eight hits and six runs -- five earned -- in 3 2/3 frames.