"I just think it's a matter of guys squaring up poorly executed pitches at times," Padres pitching coach Darren Balsley said.
Those five home runs tied for the most in one game by an opponent at Petco Park (July 14, 2006, vs. Atlanta).
The longballs are coming at a higher rate than in recent memory. Through the same number of games in 2012, the Padres had allowed 48 home runs; in 2011 that number was 38, and in 2010 it was 41.
The Padres have allowed 33 of those home runs in 27 games at Petco Park. Last season, they allowed 62 in 81 home games.
"We have to execute better throughout the game," Balsley said. "It just seems at this point a lot of our mistakes are getting hit over the fence instead of line drives or hard groundballs."
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. Jamal Collier is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.