FREDERICK, MD., JUNE 9 -- Frederick, with a six-run third inning and behind Ken Shamburg's four RBI, beat Peninsula, 7-3, tonight in front of 6,457 at Harry Grove Stadium.

Jeff Bumgarner went eight innings for the Keys, giving up 12 hits. He struck out three and walked three to even his record at 2-2. Steve Mondile pitched the ninth, striking out two.

Kyle Duke (2-8) was the loser.

The Keys (32-24), who lead the Carolina League's Northern Division, sent 10 batters to the plate in the third, scoring six runs on five walks and three hits after trailing by 3-1.

Tony Beasley beat out a hit. Mike Devereaux (who was sent down by the Orioles for rehabilitation of a pulled hamstring) and Holland walked to load the bases for Shamburg.

His double down the right field line scored three runs, giving him 46 RBI this season. Ed Horowitz's single to center scored Shamburg and Daniel Berthel. Pete Rose bounced out to first to score Tyrone Kingwood. Beasley then ended the inning with a roller to the mound.

Peninsula (16-42) sent eight batters to the plate in the first inning to score three runs on four hits.

Frederick closed the gap to 3-1 when Shamburg's two-out double to left center scored Tim Holland in the home half of the first.