With the bases loaded, Isaac Galloway cleared the bases on a three-run double to give the Suns a 7-0 advantage.
Bradley, who took the loss went 4.1 innings and gave up hits on seven runs, a season high.
The Stars dropped their fifth straight game and will try an avoid the series sweep in the series finale Monday afternoon.
The Stars(19-25, 65-49) trail the Suns(64-49,28-15)4-0 in their five game series which will conclude Monday afternoon. The Stars will have LHP Brent Suter(9-8, 4.34) on the mound. Jacksonville will send RHP Dustin Mosley(1-1, 3.46) to the hill.