Byron takes Pocono pole as he and Truex continue battle for Cup Series points lead

William Byron took the pole position at Pocono while leading the Cup Series points standings.
Martin Truex Jr. qualified second and is second in points behind Byron as both chase a championship.
Truex says he hasn't decided if he will retire or return to Joe Gibbs Racing next season.
Last year's Pocono winner Denny Hamlin had his victory taken away due to a disqualification.
Byron and Truex enter as favorites to win Sunday's race at Pocono Raceway.