Bradley, Lopez homer in Seattle win over Brewers
Milwaukee's season-long five-game winning streak ended despite a four-run third that included Prince Fielder's 15th homer and a wild play that saw Corey Hart coming around to score on an error after hitting a double.
Sweeney (1-0) had been recalled from Triple-A Tacoma on June 15 and made his first appearance since playing with San Diego after Doug Fister finished four innings in his return from the disabled list.
Brandon League saved his second game and first since closer David Aardsma left for the birth of his child.
Lopez's homer extended his hitting streak to 10 games.