MINNEAPOLIS (AP) — Matt Wallner hit the go-ahead three-run homer for the Minnesota Twins in the fifth inning of the nightcap to spoil Cleveland starter Alex Cobb's season debut, fueling a 6-3 victory for a doubleheader sweep on Friday that gave the Guardians their seventh straight loss and further tightened the AL Central race. Bailey Ober pitched six shutout innings and Carlos Santana and Ryan Jeffers hit solo homers to win the opener 4-2 for the surging Twins (65-50), who cut their deficit to 11⁄2 games behind the Guardians (67-49). That's the closest defending division champion Minnesota has been since May 13 to Cleveland, which has held first place for all but seven days in April.

Cobb (0-1), who was acquired for prospects on July 30 in a trade with San Francisco, surrendered three consecutive two-out hits in the fifth after Josh Naylor's three-run homer gave the Guardians a 3-2 lead in the top of the frame. Wallner's soaring 106.9 mph drive to right field, his fourth home run in his last 10 games, was the first homer on a 3-0 count for the Twins this season and the last pitch for Cobb.

The 36-year-old had offseason hip surgery after making his first All-Star game last year for the Giants. The Guardians, who hadn't lost more than three games in a row all season until this skid started last weekend, went hitless against relievers Cole Sands (6-1), Caleb Thielbar and Trevor Richards after tagging Twins starter Louie Varland for eight hits and three runs in 4 2/3 innings.