Who was the true difference-maker in Friday night's 10-9 Rockies victory at Coors Field? If you said Jordan Pacheco, whose fifth-inning grand slam off Madison Bumgarner broke a 5-5 tie, thanks for playing and better luck next time. The answer is Colorado center fielder Dexter Fowler, who made a terrific diving catch to rob Angel Pagan of extra bases and stop a seventh-inning rally at three runs. The Giants have acted like a runaway locomotive once they launch a comeback. Fowler played Superman, standing on the track and stopping that train with the palm of his hand. Fowler's play stood in complete contrast to the Giants' defense, the real culprit in a loss that ended their 10-game win streak against Colorado - and for that matter, their 1-3 trip. The Giants committed four more errors, by Bumgarner, Pagan, Pablo Sandoval and Marco Scutaro, giving them nine in the four games. They had but 21 in their first 38 games. The Bumgarner, Sandoval and Pagan throwing errors helped the Rockies overcome a 4-0 Giants lead and made two of Bumgarner's career-worst nine runs unearned. The Giants have allowed 37 runs on the trip, 10 unearned, and lost Friday for only the third time in 74 games since the start of 2010 when they scored at least nine times. "We shot ourselves in the foot," manager Bruce Bochy said. "Too many errors, particularly in this ballpark. Walks and errors kill you here. We've got to tighten things up. "Obviously we've got to pitch better too. Our offense is doing a great job coming back. We've got to get this pitching back on track and play more of our kind of game." Yes, Bochy and his staff talk to the players about concentration on the mound, in the field and at the plate. Bumgarner said they should not have to. "The pitchers have to pitch and everyone else knows what they've got to do," he said. "There's no need to get around talking about it. It's not like everyone isn't trying to make plays and pitches." It's just not happening, though, and good hitting performances are being wasted. On Friday that meant the three-hit nights from Sandoval and Scutaro, who extended his streak to 16 games, the longest in the majors right now. Buster Posey homered in the eighth to make it a one-run game before Rafael Betancourt struck out the side in the ninth to save it. Errors aside, it was a 5-5 game when Bumgarner walked D.J. LeMaheiu with two outs in the fifth to load the bases. George Kontos was ready in the bullpen, and Bumgarner had thrown 101 pitches. But Bochy, as he often does, gave his starter the benefit of the doubt.