Bieber (11-4) allowed five hits, struck out eight and walked none. Bieber, the All-Star Game MVP, is 9-2 in his last 15 starts.
Cleveland is 37-15 since June 4, the best record in the major leagues in that span. After trailing by as many as 11½ games in early June, the Indians started Sunday three games back of AL Central-leading Minnesota.
Brian Anderson connected for the Marlins, who have lost four of five. Caleb Smith (7-5) gave up three runs — one earned — six hits and in five innings.
The Phillies are still in the NL wild-card hunt but lost two of three at home to the below-.500 White Sox. Not even appearances by Chase Utley, Ryan Howard, Pedro Martinez and the rest of the 2009 NL champions could inspire the Phillies and they trailed all the way against Reynaldo Lopez (6-9) and three relievers.
Philadelphia left-hander Drew Smyly (2-6) permitted five runs in five innings.
Mancini has 15 RBIs in 13 games against Toronto this season.
The Orioles won a mistake-prone game with wild pitches, misplayed balls, costly walks and baserunning errors.
Tom Eshelman (1-2) earned his first major league win after allowing four runs and eight hits over five innings. Shawn Armstrong picked up his fourth save.
Source: Fox Sports