From the ESPN press release:

ESPN2’s live coverage of the 2009 MLS Western Conference Finals Friday, Nov. 13, a 2 – 0 extra time victory by the Los Angeles Galaxy over the Houston Dynamo, was seen in an average of 538,000 television homes (700,000 people 2+), based on a 0.5 rating, making it the most-watched MLS telecast ever on the network.

The previous record was on Thurs., Aug. 23, 2007, in a regular-season match between Chivas USA and Los Angeles, seen in an average of 532,000 television homes (658,000 P2+), a 0.6 rating.

Additionally on ESPN Deportes, the match was seen in an average of 73,000 Hispanic television homes (121,000 Hispanic P2+), a 1.6 Hispanic coverage rating.

Hmm. How much higher would the ratings have been if the game hadn’t ended at 2:30 a.m. or so back on the East Coast?