According to Richard Sandomir at the New York Times, the Angels - Yankees ALCS game 6 that wound up the deciding game of the series was much more watched than the NFL contest between the Arizona Cardinals and New York Giants in the local NY market. Nearly three times as many households on average tuned to the baseball game as the football game:
The Yankees’ 5-2 victory, which moved them into the World Series, produced a 26.4 local Nielsen rating (or 1.98 million households in the nation’s No. 1 market), nearly tripling the 9.3 (699,000 homes) for theGiants’ 24-17 loss. Clearly, more was at stake with a playoff game on Fox than a regular-season game on NBC.
The rating for the Yankees game started at a 19.6 (1.47 million homes), its lowest point of the night, and finished with its peak, a 30.0 (2.25 million homes), from 11:45 p.m. to midnight.
The local rating for the Giants game gyrated throughout the night, going as low as a 7.7 (580,000) from 10 p.m. to 10:15 p.m., and rising to its highest level, an 11.6 (868,000), from 11:15 p.m. to 11:30 p.m.