GREENSBORO, N.C. — While Will Zalatoris went about fulfilling autograph requests for rows of Wyndham Championship spectators after wrapping up his third round Saturday, a few feet away coach-turned-caddie Josh Gregory explained what he tried to provide during his emergency fill-in role. “Hopefully a little smile,” Gregory said. “Most importantly, he needed to laugh and smile. He needed to have fun. And I think just commitment. I’m about as positive of a coach as I can be, and I was just super positive with him.” It made for a contrasting scene in regard to the events that followed the finish…