Kyle Busch, Hamlin scrap engines

After Joe Gibbs Racing lost two entrants in last week's Daytona 500 due to engine failures, Denny Hamlin and Kyle Busch's teams have opted to change their motors prior to the Subway 500 at Phoenix International Raceway. Hamlin's engine expired during practice Saturday. For Busch, whose engine failed two laps after JGR teammate Matt Kenseth ended up on pit road on Lap 150 last Sunday at Daytona, the team detected something in the engine during the morning tune-up. Busch, who qualified fourth, and Hamlin (8th) will now start from the back of the field.