Kurt Busch will be behind the wheel of the No. 18 Shore Lodge Tundra in Saturday’s VFW 200 at Michigan International Speedway, with the driver lineup for the remaining races that Leffler was scheduled to drive to be determined at a later date.
"How things have played out this season are not Jason's fault -- we've had some bad luck and a few other misfortunate (sic) happenings -- but when it comes down to it, the No. 18 team has not performed to the standards we've become accustomed to,” said team owner Kyle Busch. “We owe it to our manufacturer and our sponsors to produce better results.
“Beginning to make these changes now, instead of waiting until the end of the season, will allow us to evaluate where our program stands as we begin working toward becoming a championship-contending team once again in 2013. Jason represented KBM and all of our sponsors very well and we wish him the best of luck."
Brian Scott is scheduled to be behind the wheel of the No. 18 Tundra at Bristol Motor Speedway on Aug. 24 and for three other races this season. Drew Herring will make his Truck Series debut in the September race at Iowa Speedway in Newton.