Holding the Colorado Rockies to two runs at Coors Field is normally a cause for celebration.San Francisco Giants starting pitcher Madison Bumgarner, third from left, is surrounded by teammates after giving up a bunt to Colorado Rockies starting pitcher Franklin Morales (56) during the fourth inning of a baseball game, Tuesday, April 22, 2014, in Denver. Giants first baseman Brandon Belt was given an error on the play.San Francisco Giants' Ehire Adrianza, top, throws to first for a double play over the head of Colorado Rockies' Justin Morneau, bottom, during the fourth inning of a baseball game, Tuesday, April 22, 2014, in Denver.Colorado Rockies' Franklin Morales, left, successfully bunts on a pitch from San Francisco Giants starting pitcher Madison Bumgarner, right, during the fourth inning of a baseball game, Tuesday, April 22, 2014, in Denver. Giants first baseman Brandon Belt was given an error on the play.San Francisco Giants starting pitcher Madison Bumgarner throws during the first inning of a baseball game, Tuesday, April 22, 2014, in Denver.