For the last four weeks, the Cubs' bullpen has been the shining star on a team that has struggled to find consistency.
Sunday, the bullpen was the Cubs' undoing in a 4-3 loss to the Marlins in front of 33,134 fans at Wrigley Field, snapping Chicago's five-game winning streak.
Entering play Sunday, Cubs relievers had posted a 2.01 ERA in 80.2 innings since May 12, but Brian Schlitter and Pedro Strop each allowed two runs, handing the series finale to the Marlins.
The Cubs jumped out to a 2-0 lead on a two-run Nate Schierholtz triple in the sixth, but Schlitter let the Marlins tie the game in the seventh on a walk and three singles.
Luis Valbuena put the Cubs ahead again in the bottom of the seventh with a bases-loaded walk before a wild inning from Strop - that included two walks, a hit batter, a single, a wild pitch and a sacrifice fly - erased that lead.
Strop was saddled with the loss, wasting Jake Arrieta's strong outing in which he allowed only three singles across six shutout innings, striking out seven batters.
The Cubs hit the road again Monday for a four-game set in Pittsburgh.