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Chicago, IL (Sports Network) - It all started with a Jeff Francoeur bunt.

Francoeur started a seventh-inning rally that snowballed into four unanswered runs after Billy Butler's career-best 22nd home run in the eighth, as Kansas City downed the Chicago White Sox, 5-2, in the middle installment of a three- game set at U.S. Cellular Field.

Butler was 2-for-4 with a long two-run shot that punctuated a late offensive onslaught for the Royals, who have won two of three. The Royals managed just one run and two hits through six frames before registering four consecutive singles in the go-ahead seventh.

Bruce Chen (8-9) won for the first time since June 26, scattering just two runs on seven hits with two strikeouts and one walk in 6 2/3 frames. Greg Holland pitched a clean ninth frame for his second save.

Jake Peavy (9-8) was the hard-luck loser, cruising before falling into trouble in the seventh. The right-hander gave up three runs on seven hits with four strikeouts and three walks over 6 2/3 frames. Alex Rios finished 2-for-4 and Gordon Beckham hit his 11th home run of the season in defeat.