Josh Saunders blocked a controversial penalty call to help the Galaxy's two first half goals stand up for Los Angeles' first road win of the season.
After 20 minutes David Beckham, making only his second appearance in Colorado since joining MLS in 2007, deceptively angled a free kick into the box, where an unmarked Mike Magee headed back across goal. Rapids defender Marvell Wynne tipped the ball past his own goalkeeper to open the scoring.
Donovan doubled the lead before the half. The Galaxy worked the ball forward from deep in their own half through Magee and Beckham. They found the U.S. international, who sped up the play and linked the ball to Robbie Keane. Donovan continued his run, and Keane returned the pass, leaving Donovan to slot past Matt Pickens with his left foot.
Cummings halved the deficit after an hour. He rode the challenge from David Junior Lopes and smashed a rising left-footed blast from outside the box.
The Jamaican had a chance to complete the comeback in stoppage time. The referee bizarrely whistled a penalty and booked Lopes when Andre Akpan threw himself helplessly at a hoofed ball. Los Angeles will feel justice prevailed when Josh Saunders firmly pushed Cummings' weak effort away to preserve the three points.
The win sees LA join the Rapids on nine points in the Western Conference.
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