Jason Castro snapped a tie with a run-scoring double and Hunter Pence went 3-for-4 with a home run and two RBIs as the Houston Astros earned a split of their four-game series against the Los Angeles Dodgers with a 7-4 victory.

Brett Wallace added two hits and two RBIs while Carlos Lee also homered for the Astros, who have won six of their last eight home games.

With the game tied at 4-4, Wallace ignited a two-run rally in the fifth with a one-out double off Ramon Troncoso (1-3). Castro drove him in two batters later with a double and pinch-hitter Geoff Blum followed with a ground-rule double that plated Castro and gave Houston a 6-4 bulge.

Lee capped the scoring in the eighth with a solo shot, his 21st of the year.

Gustavo Chacin (2-2) recorded the last out of the fifth inning to notch the win and four other relievers bridged the gap to Brandon Lyon, who worked a perfect ninth for his 15th save in 16 opportunities.

The Astros got to Carlos Monasterios early, scoring four times on five hits in the first inning. Pence belted a two-run homer, his 24th of the season, and Wallace plated a pair with a single.

Los Angeles answered in the fourth with four runs of its own. Jay Gibbons highlighted the rally with a three-run blast, his fifth of the year and second in three games and James Loney followed with a triple before scoring on a sacrifice fly by Russ Mitchell.

Neither starting pitcher made it through the fifth inning. Monasterios yielded four runs - three earned - and five hits while recording just four outs, while Houston's Nelson Figueroa also surrendered four runs and five hits in 4 2/3 frames.