AVONDALE, Ariz. (AP) — Denny Hamlin was shell-shocked, a vacant look in his eyes, as he tried to explain how he yet again came up short in his quest to win a NASCAR championship. William Byron approached, placed his hand on Hamlin’s shoulder, and apologized for causing the caution that cost Hamlin the title. The greatest NASCAR driver to never win a championship fell short of ditching that label when Byron blew a tire Sunday at Phoenix Raceway that began the sequence of events that cost Hamlin