MLB: Walk-off HR gets Arenado cycle

Nolan Arenado completed the cycle with a three-run homer in the bottom of the ninth inning, and the Rockies stunned the Giants by rallying for a 7-5 victory Sunday in Denver. Arenado hit the first pitch he saw from

Mark Melancon into the left-field seats to finish a four-game sweep.

In Houston, Xander Bogaerts went deep twice for the first multi-homer game of his career and had four RBIs to lead the Red Sox to a 6-5 win over the Astros.

In Pittsburgh, John Lackey and three relievers combined on a three-hitter, and

Anthony Rizzo homered among his three hits to lead the Cubs past the Pirates 7-1. The defending World Series champions are back at . 500 (34-34) for the season.

In Anaheim, Calif., Jason Vargas earned his 10th win, most in the majors, and

Salvador Perez hit a three-run homer as the Royals beat the Angels 7-3. Mike Mous

takas added a three-run double for K.C. In Baltimore, Ubaldo Jimenez was stellar in his first start since May 22, Mark

Trumbo homered for the second consecutive day and the Orioles beat the Cardinals 8-5.