03/07/11 NASCAR Sprint Cup Racing on FOX posted a solid 5.3/11 Sunday for the Kobalt Tools 400 from Las Vegas, up 29% over last year's 4.1/8. Y Sunday's race marked the third consecutive time that a NASCAR Sprint Cup Race on FOX was up over the previous year, and for the third consecutive time, it ranked as the top-rated event of the weekend. Yesterday's gains in the top ten markets: Los Angeles (+44%), Chicago (+136%), Philadelphia (+76%), Dallas (+81%), Boston (+84%), and Washington DC. (+39%). Yesterday's telecast opened up with a 4.5/10, and grew steadily throughout the telecast peaking at a 6.2/12. Season-to-date, NASCAR Sprint Cup Racing on FOX is averaging a 6.3/13 through three races, up 17% over last year's 5.4/11 and flat with 2009.