OAKLAND, Calif. (AP) — Khris Davis homered and hit an RBI double against previously unbeaten Zack Greinke, and the Oakland Athletics sent the Houston Astros to their sixth straight loss, 4-2 Tuesday in the first game of a doubleheader.Ash from nearby wildfires fell inside the Coliseum as the A’s stretched their AL West lead over second-place Houston to 5 1/2 games.Robbie Grossman hit a go-ahead double in the sixth and Ramón Laureano added an RBI single for Oakland.The A’s played as the visiting team in a makeup of a postponement from Aug. 30 after pitcher Daniel Mengden’s positive coronavirus test result.Davis snapped an 0-for-8 stretch playing for the first time since Aug. 26 at Texas. He began the day 3 for 8 lifetime against Greinke with a home run and a double.Greinke (3-1) allowed four runs and seven hits over six innings. He struck out six.A’s starter Frankie Montas (3-3), 0-2 over his previous three outings, gave up two runs on six hits in five innings. Liam Hendriks finished for his 11th save.Michael Brantley hit a two-run homer in the fifth for Houston. The Astros’ losing streak is their longest since a seven-game skid in June 2019. TWINS 7, CARDINALS 3, 1st gameST. LOUIS (AP) — Josh Donaldson, Nelson Cruz and Miguel Sanó homered, leading Minnesota to a win over St. Louis in the first game of a doubleheader.Jose Berríos (4-3) earned the win, pitching into the sixth before being lifted. He gave up three runs on four hits and struck out eight. Carlos Martinez (0-2), who had missed more than a month while dealing with the coronavirus, was chased in the fourth.Tommy Edman hit a two-run homer in the sixth for St. Louis. PHILLIES 6, RED SOX 5, 1st gamePHILADELPHIA (AP) — Alec Bohm hit a two-out, two-run single in the seventh inning to rally Philadelphia over Boston in the first game of a doubleheader.Bohm drove in four runs with three hits, including his winner off Matt Barnes (1-3) as the Phillies compete for their first playoff berth since 2011.Hector Neris (2-1) pitched 1 1/3 scoreless innings to get the win in an only-in-2020 one day, two-game series. Rafael Devers homered twice and Bobby Dalbec continued his homer hot streak for the Red Sox. Alex Verdugo also hit one of Boston’s four solo homers to nearly make a winner out of Martin Pérez.___More AP baseball: https://apnews.com/MLB and https://twitter.com/AP_Sports