Coming off his two-hit shutout against Tampa Bay, Dickey (8-8) was sharp and won for the third time in four starts. The knuckleballer allowed two runs and six hits in seven innings, striking out four and walking one.
Reyes hit a leadoff shot in the third against Tigers rookie Jose Alvarez (1-2). For Reyes, it was his third homer of the year and second in two days.
DeRosa added a three-run drive in the fourth off reliever Luke Putkonen. Prince Fielder and Omar Infante hit solo homers for the Tigers. Detroit lost for the sixth time in seven games.
Infante went 4 for 4 with a two-out homer in the ninth. Tigers star Miguel Cabrera, who came in with an AL-leading .373 batting average, went 0 for 4 with two strikeouts.