Rockies 8, Pirates 1: Nolan Arenado bounced back from his benching with a homer among his three hits and drove in two runs while rookie Tyler Matzek allowed three hits in seven shutout innings as host Colorado won its third straight game.

Josh Rutledge recorded three hits and three RBIs, Corey Dickerson homered and drove in a pair, and Drew Stubbs also went deep for the Rockies. Matzek (2-4) snapped a seven-start winless streak since prevailing in his first career outing as Colorado has outscored Pittsburgh 16-2 in the first two games of the series.

The Pirates' Jeff Locke (2-2) had his seven-start unbeaten streak snapped after allowing six runs and 10 hits in 6 2/3 innings. Ike Davis hit a pinch-hit homer and Neil Walker had his 22-game streak of reaching base safely - the longest active run in the majors - halted after going 0-for-4 as Pittsburgh lost its fifth straight at Coors Field.

The Rockies took a 1-0 lead in the third when Matzek led off with a single and Charlie Blackmon reached on a fielder's choice, moved to second on a throwing error, stole third and scored on Rutledge's single. Stubbs led off the fourth by culminating an eight-pitch at-bat with a homer to left - his 11th of the season - to make it 2-0.

Colorado doubled its advantage in the fifth as Matzek led off with a walk and scored on Arenado's single, and Dickerson delivered an RBI groundout. Arenado, who was taken out of Friday's game for not hustling on a groundout, and Dickerson delivered solo shots in the seventh with the latter a two-out blast which chased Locke.

GAME NOTEBOOK: Rockies RF Carlos Gonzalez did not play after spraining his right ankle at home Saturday morning, and according to manager Walt Weiss, "it's very swollen.'' ... Stubbs left for pinch-hitter Dickerson in the fifth after turning his left ankle. ... Locke has yielded eight home runs in 2014 - five to Colorado in his last two starts.