Speedway Motorsports Inc. executive chairman Bruton Smith revealed Friday that he was treated for non-Hodgkin's lymphoma in June and used this weekend's races at Bristol Motor Speedway as motivation during his recovery. Smith arrived at Bristol on Wednesday for the Truck Series race - his first since his diagnosis - and will stay until Saturday night's Sprint Cup Series event. ''I hate to miss any of our races, it's heartbreaking,'' Smith said in an interview with The Associated Press and ESPN.com. More...