Hamlin triggers six-car crash

The 2010 NASCAR season got off with a bang -- literally.

Late in the running of the first practice of the season, Denny Hamlin got into the back of Mark Martin's No. 5 Chevorlet and created a multi-car accident that damaged four other cars -- Jamie McMurray, Greg Biffle and Clint Bowyer, who was subbing for an ill Kevin Harvick in the session, all picked up significant damage while Joey Logano was able to get past with only minimal damage.

Hamlin, McMurray and Martin were evaluated and released from the infield care center.

The session was the first of two on the day for the exhibition Budweiser Shootout (Saturday Feb. 6 at 8 p.m. ET on FOX).

McMurray, Martin, Hamlin, Biffle and Harvick will switch to a backup car for the race. NASCAR says that any driver who practices their backup car before Saturday's race will be able to keep the starting position they select during a blind-drawing for the event.