How it happened: The Cubs were dominated by A.J. Burnett, who allowed just two hits through eight innings. Alfonso Soriano hit a two-run homer to spoil the shutout with one out in the ninth. Starting pitcher Jeff Samardzija was seeking just his fourth win of 2013 despite carrying a 2.96 ERA into the game, but he struggled and yielded four earned runs in six innings.
What it means: Burnett is now 5-0 lifetime at Wrigley Field. The Cubs have lost four out of their last five games after winning a season-high five straight.
Outside the box: Manager Dale Sveum said he is considering giving struggling shortstop Starlin Castro a day off. Castro has not missed a game since 2011. The Cub shortstop hit the ball hard three times on Saturday with no results.