HOUSTON, April 20 (UPI) -- The San Francisco Giants chased Tim Redding with five runs in the third inning and held on Saturday night for an 13-9 victory over the Houston Astros after nearly squandering a seven-run lead.
Russ Ortiz (2-1) benefited from the outburst, overcoming solo homers by Jeff Bagwell in the first inning and Craig Biggio in the third. He allowed five runs and six hits over six-plus innings with three walks and five strikeouts.
With the Giants holding a 9-2 lead, Ortiz tired in the seventh, surrendering three runs without retiring a batter. Houston rookie Morgan Ensberg led off with his first major league homer.
Robb Nen finally ended Houston's uprising, getting Bagwell to ground out, then recorded the final three outs for his fifth save.
J.T. Snow, who drove in five runs and tied a career high with four hits, gave Nen some breathing room by belting a two-run homer off Octavio Dotel in the top of the ninth.
The teams combined for 12 runs over the final three innings.
Redding (0-1) was recalled from Class AAA New Orleans of the Pacific Coast League before the game, but failed to retire a batter in the third, when the Giants strung together four hits.
Redding balked in the tying run before Jeff Kent delivered an RBI single to give the Giants a 2-1 lead. Reggie Sanders followed with a two-run double and Snow knocked out Redding with an RBI single.
Biggio's homer in the third made it 5-2, but the Giants tacked on three runs against rookie Brandon Puffer in the fourth.
After Bonds led off with a double, Kent reached on an infield single and Puffer hit Sanders to load the bases. Snow delivered a two-run single and Tsuyoshi Shinjo lifted a sacrifice fly to make it 8-2.