MLB: Colorado 4, Pittsburgh 1

DENVER, May 1 (UPI) -- Jason Hammel held Pittsburgh to one run over seven innings and Chris Iannetta smacked a three-run homer Saturday in Colorado's 4-1 win over the Pirates.

Hammel (3-1) yielded six hits and walked two while striking out four, allowing only Andrew McCutchen to reach home with a first-inning solo homer.

Rafael Betancourt tossed a scoreless eighth and Huston Street picked up his 10th save as the first-place Rockies evened their three-game series with the Bucs at one win apiece.

Iannetta's homer capped a four-run second inning that also included an RBI single from Seth Smith.

Paul Maholm (1-4) surrendered four runs on seven hits over seven frames for Pittsburgh.