Rockies 8, Dodgers 4: Wilin Rosario went 3-for-4 with a home run and three RBIs as host Colorado posted its eighth win in 10 games.

Rosario, who set the franchise single-season record for homers by a catcher in Monday's series opener, belted his 22nd shot in the third inning, a one-out solo blast that gave Colorado a 5-1 lead. The rookie had hit a run-scoring single during the Rockies' four-run first and added another in the seventh for his fifth RBI of the series.

Los Angeles center fielder Matt Kemp left the game in the first inning with a right knee contusion and was slated to undergo X-rays on his jaw after crashing into the wall while attempting to catch a deep fly hit by Josh Rutledge. Kemp remained in the game after being attended to, but pulled himself two batters later.

Rutledge legged out a triple on the play on which Kemp was injured and scored on a double by Jordan Pacheco, who raced home on Rosario's single. Andrew Brown delivered an RBI base hit two batters later and DJ LeMahieu capped the uprising with a run-scoring double.

Tyler Chatwood (4-3) allowed two runs and five hits in five innings en route to his third win in four decisions.

Dodgers starter Chris Capuano (11-10) surrendered six runs and 10 hits over six frames. The veteran left-hander, who struck out three without a walk, fell to 2-6 since the All-Star break.

Hanley Ramirez belted a solo home run for the Dodgers, who lost for the sixth time in eight contests and fell 3 1/2 games behind first-place San Francisco in the National League West.

GAME NOTEBOOK: Rockies 2B LeMahieu had 12 assists to tie a major-league record. He's the 10th second baseman to accomplish the feat and the first since 1986. ... Colorado has won seven of nine at home. ... Kemp has hit only five home runs in 42 games since returning from a hamstring injury on July 13. ... Colorado LHP Jorge De La Rosa is expected to throw a bullpen session Wednesday as he continues his quest to return from Tommy John surgery. De La Rosa has been out since May 2011. ... Capuano has lost eight of his last 10 decisions.