With the victory, the Galaxy (11-9-4) pulled within four points and are currently sitting in third place in the West.
After a insane half of defense between both clubs, Real Salt Lake Alvaro Saborio kicked a shot on goal and new Galaxy goalkeeper Jaime Penedo made an amazing save in the 48th minute.
However in the 53rd minute, Joao Plata scored the first goal of the game and gave Real Salt Lake (12-8-5) the 1-0 lead.
Robbie Keane scored on a perfect assist from Juninho in the 64th minute for the 1-1 tie. Keane was from finished when he knocked in a goal in the 67th minute that gave the Galaxy the 2-1 lead.
An overzealous Omar Gonzalez who signed a huge designed player contract on Thursday, knocked in a goal from a corner kick from Landon Donovan in the 75th minute. The Galaxy lead 3-1 over RSL.
The RSL defense broke down even more when Keane blasted a goal past RSL goal keeper Nick Rimando for the 4-1 lead. Keane's tenth goal on the season completed the hat trick.
"We played well the whole 90 minutes. We probably deserved a 4- or 5-0 game, but real happy with how we performed," said Donovan.
There was lapse in defense for the Galaxy when Real Salt Lake's Robbie Findley scored in the 90th minute.
The Galaxy return to MLS action when they face Vancouver on the road on August 24th.