DENVER (AP) -- Preston Tucker homered and drove in three runs, pinch-hitter Domingo Santana got his first major league home run and the Houston Astros beat the Colorado Rockies 8-4 Thursday for their fifth straight win.Carlos Correa stole three bases, and George Springer extended his hitting streak to 11 games as the Astros swept the four-game, home-and-home series with the reeling Rockies. The Astros hit six homers in two games at Coors Field, raising their AL-leading total to 97.Collin McHugh (7-3) treated himself to an early birthday present by getting the win despite allowing three runs four hits and a season-high five walks in six innings. McHugh, who turns 28 on Friday, settled down after surrendering a three-run homer to Carlos Gonzalez in the first. David Hale (2-2) gave up a season-high five runs in five innings and struck out nine. Rockies pitchers struck out 17 batters, a Colorado record for a nine-inning game.Santana was recalled from Triple-A Fresno this week when Colby Rasmus went on the bereavement list following the death of his grandmother. Santana lined a hanging slider from Scott Oberg into the bullpen for a three-run homer, giving the Astros an 8-3 lead.Chris Carter drove in two runs as Houston improved to 8-1 in interleague play this season after going 5-15 a year ago.After a rocky first, McHugh allowed only two hits before handing things over to the bullpen. McHugh spent the 2013 season with the Rockies, going 0-3 with a 9.95 ERA before being waived and claimed by Houston on Dec. 18, 2013. He is 14-3 since August.Third-base umpire Bob Davidson left in the third inning due to dehydration. The 62-year-old Davidson lives in Colorado.