The four top contenders imploded in NASCAR Trucks Chase opener

Motorsport photoThe NASCAR Truck Series Chase for the Championship began with a moderate implosion for each of the four top seeded drivers on the seven-race playoff on Thursday night at Bristol Motor Speedway.Layne Riggs led the first two stages but then suffered a slow pit stop, the result of struggles on the left rear, and then that tire leading to a vibration that trapped him five laps down. He would run into a crash and finished 32nd.Kaden Honeycutt finished second in the first two stages an