Three errors led to four unearned runs on Tuesday night in the York Revolution's 7-1 Atlantic League setback to the Lancaster Barnstormers.
The loss at Clipper Magazine Stadium dropped the Revs (10-10) six games behind the Barnstormers (17-5) in the Freedom Division first-half race.
Lancaster's six-run fourth inning proved to be the difference in the game.
Michael Burgess had two hits, including his fourth homer, to provide York's offense.
Mitch Atkins (0-3) took the loss, allowing all seven runs and six hits over 3 2/3 innings. His ERA stands at 8.02.
The Revs' bullpen pitched 4 1/3 innings without being charged with a run.
Nate Reed (4-0) pitched five shutout innings to get the win, lowering his ERA to 1.35. Ryan Casteel homered and drove in three runs for Lancaster. Rico Noel and Tyler Bortnick added three hits each for the Barnstormers. Bortnick finished with two RBIs.