ORLANDO – Francesco Molinari delivered another big moment on the 18th green at Bay Hill, without wearing a red shirt and leaving the flag stick in the cup. His 45-foot birdie putt capped off an 8-under 64 to come from five shots behind Sunday and win the Arnold Palmer Invitational presented by Mastercard. Molinari watched the birdie putt kiss off the pin and into the cup, and the normally reserved Italian raised his fist and hammered it down in celebration, knowing that would make him hard to beat. He started so far back that Molinari finished nearly two hours before…