DAYTONA BEACH, Fla. (AP) — Among those trying to win the Daytona 500 this year are a Florida watermelon farmer, a short-track champion from New England, a television analyst and a 22-year-old whose career nearly was derailed by a brain tumor. The front row is the youngest in Daytona 500 history and it will be William Byron, a Liberty University student who had his wisdom teeth removed in the offseason, leading the field to green in Sunday's showcase race to kick off the NASCAR season. The overall look of the nation's top racing series has undergone a transformation the last few seasons and proof is plastered on the hood of Corey LaJoie's car.