Jeff Mathis and Leody Taveras smacked back-to-back home runs in the seventh inning while Kyle Gibson produced his second scoreless outing against the Houston Astros in the Texas Rangers’ 6-1 victory on Saturday at Globe Life Field.Mathis followed a leadoff single from Anderson Tejada and a four-pitch walk by Ronald Guzman with his third home run this season, a three-run blast that snapped a 1-1 deadlock and traveled an estimated 402 feet to left-center field. Mathis chased Astros rookie right-hander Brandon Bielak (3-3) before Taveras greeted another rookie right-hander, Andre Scrubb, with his 403-foot shot to right-center on the first pitch. For Taveras, the blast was his fourth of 2020.The Astros (29-30) fell below .500 with one game remaining in the regular season. Houston clinched its fourth consecutive postseason berth and fifth in six seasons late Friday despite their extra-inning loss to the Rangers when the Los Angeles Angels fell to the Los Angeles Dodgers.Gibson worked six innings, allowing six hits and one walk with four strikeouts. In his previous appearance against the Astros, he twirled a four-hit shutout in the Rangers’ 1-0 win on Sept. 16. Gibson threw 81 pitches, including 55 for strikes, in his final start of the season for Texas (21-38).