Trey Sweeney blasted a three-run homer to cap a six-run first inning as the host Detroit Tigers extended their winning streak to four games by defeating the Colorado Rockies 7-4 on Wednesday.Kerry Carpenter supplied four hits, scored a run and drove in another for the Tigers (75-71). Riley Greene added two hits, including a solo homer, and knocked in two runs.Tyler Holton (6-1) tossed two innings of scoreless relief to pick up the win. Jason Foley got the last three outs, including a pair of strikeouts, for his 22nd save.Ezequiel Tovar drove in two runs and Ryan McMahon added a solo homer for the Rockies (54-92). Starter Tanner Gordon (0-6) gave up all seven runs on 10 hits in 3 1/3 innings. He struck out one and didn’t walk a batter.Greene began Detroit’s first inning outburst with a one-out homer. He lofted a Gordon changeup just over the right-center-field wall for his 21st homer.Matt Vierling followed with a single, and Carpenter brought him home with a triple along the right field line. Carpenter scored on Spencer Torkelson’s two-out single. Jace Jung smacked a single before Sweeney deposited his fourth homer over the right field wall.McMahon put Colorado on the board with his 19th homer leading off the second.Carpenter and Keith had back-to-back singles leading off the third, but Gordon kept the score at 6-1 by setting down the next three batters.