http://www.discounttiremotorsports.com/Brad/bradKeselowskPick22.shtml
One entry per person, per race
There are 15 separate Nationwide Series races for fans to participate in during the season. For each of the Pick 22 To Win races, Discount Tire will award one grand prize along with five runner-up prizes. The weekly Pick 22 To Win grand prize is a set of four Goodyear tires with a retail value of up to $1,000 including installation and taxes.
One entry per person, per race. Weekly grand prize cannot be won more than one time per contestant. Runner up prizes can be won multiple times per season.