Jose Guillen homered twice and Brian Bannister pitched 7 1/3 strong innings as the Kansas City Royals welcomed the Colorado Rockies to interleague play with a 9-2 victory on Friday.

Mike Aviles, Jason Kendall and David DeJesus added an RBI apiece for the Royals, who moved to 6-2 under new manager Ned Yost.

Guillen kicked off the scoring in the fourth when he followed Billy Butler's single with his homer off Rockies starter Jason Hammel (1-3). Guillen got to Hammel again with a solo blast leading off the seventh to move into a tie for fourth in the American League with 11 home runs.

The Royals ended up breaking it open after Guillen's second blast, knocking Hammel out with a four-run seventh. Kendall, Aviles and DeJesus each had RBI singles in the frame.

Bannister held the Rockies scoreless through seven innings before tiring in the eighth and allowing a leadoff single to Ian Stewart and a two-run homer to Clint Barmes.

Bannister (3-3) was charged with two runs on seven hits while walking one and striking out four to earn his second straight win.

Kansas City took advantage of a wild pitch, a passed ball and a sacrifice fly to push three more runs across in the eighth.

Troy Tulowitzki had a pair of hits for Colorado, which has lost four of five.