After exiting the infield care center, Blaney stated that he was unsure of what caused his tire to go down in Saturday's practice session. "I'm not sure, honestly. I don't know, it ran 18-20 laps ...

Ryan Blaney suffered damage after a crash in practice for Sunday's Pennzoil 400 at Las Vegas Motor Speedway, which was triggered by a blown right rear tire. / Lesley Ann Miller, LAT Images for ...