LEBANON, Tenn. — Denny Hamlin looked in his mirror wondering why nobody else went with him when the green flag dropped at the start of the Cracker Barrel 400 on Sunday night. He said nothing on his radio, instead paying the penalty by going to the back of the field. Then he drove his way back to the front where he outraced Christopher Bell over the last four thrilling laps off a final restart to win at the Nashville Superspeedway.“Man, what an unbelievable day,” Hamlin said. “Starting first, going to last and back to first.”This was Hamlin’s second win this year and 62nd of his career, and he wound up leading a race-high 57 laps including the one that mattered most.The 45-year-old Hamlin wound up racing side-by-side with his Joe Gibbs Racing teammates Bell and Chase Briscoe making it three-wide before Hamlin took the lead down the backstretch to win by 0.115 seconds in his No. 11 Toyota.“Well, that’s why on the last lap, I committed to just run the bottom,” Hamlin said. Team co-owner Heather Gibbs said watching the teammates race so hard was like kids on a family vacation swatting at each other in the backseat. But she said they raced cleanly. “We want them to race for the win,” Heather Gibbs said. “That’s what they do, and it makes us proud.”Hamlin, who won at Las Vegas and also the All-Star race …