CLEVELAND — Jed Lowrie hit a three-run homer and Elvis Andrus had a solo shot in the eighth inning in the Athletics’ 6-3 comeback victory over the Indians on Wednesday night. Oakland scored twice in the seventh and four times in the eighth, erasing 2-0 and 3-2 deficits to extend its winning streak to six. The A’s lead the AL wild-card race by a game over Boston. Andrus opened the eighth with a tying homer off Nick Sandlin (1-1), who faced three batters and allowed three runs before departing with shoulder tightness. After Mark Canha was hit by a pitch and Starling Marte singled, Lowrie hammered a towering drive to right off Trevor Stephan to give Oakland a 6-3 advantage. The Indians went ahead 3-2 in the seventh when Myles Straw walked with two outs, then scored on Oscar Mercado’s double to the wall off Diekman. Cleveland plated a pair in the first off Frankie Montas, one unearned on a Lowrie error that brought Bradley Zimmer around. Franmil Reyes scored on Harold Ramírez’s single. The first pitch was delayed by 50 minutes by rain.