Juninho scored in the 11th and 33rd minutes -- the first on a spectacular free-kick tally -- while Keane scored in the 36th and 92nd minutes for his 12th and 13th goals of the season.
Landon Donovan added two assists for the Galaxy (15-11-4), who won their fourth straight and finished the night alone in the Western Conference's second position.
Terry Dunfield and Luis Silva scored for Toronto (5-18-7).
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