Rockies 5, Giants 4: Brandon Barnes delivered a two-run, inside-the-park homer with two out in the ninth inning as visiting Colorado performed last-inning heroics for the second straight game en route to its fourth straight victory.

After Charlie Blackmon reached with his third hit of the game with two out, Barnes ripped a line drive to right-center against Sergio Romo (3-3) that skipped past center fielder Angel Pagan and rolled all the way to the wall as Barnes raced home to record his second inside-the-park home run in 10 days. Romo, who allowed five runs in the ninth inning of Colorado's 7-4 series-opening victory Friday, has yielded 11 runs in three innings over his last four appearances against the Rockies.

Charlie Blackmon (RBI) and Michael McKenry each had three hits, while Josh Rutledge and Ryan Wheeler also drove in runs for the Rockies. Rex Brothers (3-4) struck out the side on nine pitches in the eighth and LaTroy Hawkins survived a pop-up falling on the infield for a single in the ninth to earn his 13th save and second in two games.

Buster Posey belted a two-run homer to make it 3-3 in the fifth and delivered a tiebreaking sacrifice fly in the seventh for San Francisco, which has lost five of six. Hunter Pence also went deep and scored twice for the Giants, who last dropped back-to-back games at home to Colorado in 2012.

Pence hit San Francisco's first home run in eight games - a 3-2 offering out to left-center - with one out in the first. Colorado took a 2-1 lead in the second on Wheeler's RBI double and Blackmon's two-out run-scoring single, and increased its lead in the third on back-to-back doubles by Justin Morneau and Rutledge.

GAME NOTEBOOK: Colorado's Christian Bergman allowed three runs and eight hits in six innings in his second major-league start while Ryan Vogelsong yielded three runs and seven hits in five innings. ... Rockies SS Troy Tulowitzki, who leads the majors in batting at .356, did not start after injuring the middle toe on his right foot Friday and flew out as a pinch hitter for the second out of the ninth. ... San Francisco fell to 19-7 in day games - the best record in the majors.