HOUSTON (AP) — The San Diego Padres had an offensive outburst that would’ve made Tony Gwynn smile on the day their all-time hits leader was inducted into the Hall of Fame.

Mike Cameron and Adrian Gonzalez hit two-run homers during an 11-run first inning off Jason Jennings in the Padres’ 18-11 rout of the Astros on Sunday.

Brian Giles had a two-run double and starting pitcher Tim Stauffer, called up from the minors on Saturday, had a two-run single as San Diego put together its biggest first inning since scoring 13 against St. Louis on Aug. 24, 1993.

Milton Bradley and Josh Bard also drove in runs during San Diego’s best run-producing inning since a 12-run outburst in the ninth inning of a 15-2 win over Colorado on Sept. 12, 2004.

Bard had an RBI double and Kevin Kouzmanoff hit a two-run homer in the ninth inning off Brad Lidge as the Padres matched their highest run total since an 18-2 win over Florida on Aug. 23, 2002.

San Diego pounded out a season-high 19 hits while Gwynn was participating in Hall of Fame ceremonies in Cooperstown.

It was the most runs allowed by the Astros in an inning since they gave up 14 in the first against Cincinnati on Aug. 3, 1989.

Jennings (2-7) allowed eight hits and three walks, including the first two batters he faced. Bradley lined a ground-rule double into the right field seats and Gonzalez hit a sacrifice fly to put the Padres up 2-0. Khalil Greene followed with a single, prompting a mound visit from Astros pitching coach Dave Wallace.

It didn’t do any good.

Bard blooped a single to left to score Bradley and make it 3-0. Kouzmanoff flew out before Jennings walked Geoff Blum to load the bases.

Stauffer, a career .154 hitter, then drove a single to left, scoring Greene and Bard and triggering boos from the fans at Minute Maid Park. Giles added a double into the right-field corner, scoring Blum and Stauffer to make it 7-0.

Cameron followed with a homer to left, his 14th. Bradley singled before Gonzalez hit his 16th homer as the jeers for Jennings intensified.

Houston manager Phil Garner finally jogged to the mound to mock cheers and Mark McLemore relieved Jennings. McLemore, called up from Triple-A Round Rock on Sunday, retired Bard on a grounder to end the inning.

Cameron tacked on an RBI double in the second inning off McLemore.