The NASCAR Sprint Cup Series Aaron's 499 earned a 4.9 overnight Nielsen rating on Fox yesterday, up 9% from last year, and marked the highest-rated sports telecast of the weekend. Saturday's NASCAR Nationwide Series Aaron's 312 on ABC was rained out and run on ESPN2 yesterday afternoon. The two NHL Stanley Cup Playoff telecasts on NBC over the weekend were up compared to the two games on the same weekend last year. The net's 1.3 average overnight rating for the playoffs to date is up slightly from a 1.2 at the same point last year. The NBA on ABC had a mixed bag, as Saturday's Celtics-Heat Game Four was down 23% from Celtics-Bulls Game Four last year, while Sunday's Cavaliers-Bulls Game Four was up 5% from Cavaliers-Pistons Game Four in '09. The chart below lists overnight Nielsen ratings from weekend sports telecasts (THE DAILY).