FORMER MASTERS WINNERS CHARL SCHWARTZEL, VIJAY SINGH AND TREVOR IMMELMAN JOIN WYNDHAM FIELD GREENSBORO, N.C. – Three former winners of the Masters Tournament, Charl Schwartzel, Vijay Singh and Trevor Immelman, will play the Piedmont Triad’s PGA TOUR event, the tournament announced today. The 76th annual Wyndham Championship starts Monday at Sedgefield Country Club. These players join World Golf Hall of Famer Ernie Els, reigning FedExCup champion Billy Horschel, 2007 champion Brandt Snedeker, 2011 champion Webb Simpson, 2011 FedExCup champion Bill Haas, Hideki Matsuyama, Major winners Jason Dufner and Retief Goosen, Paul Casey, former world No. 1 Luke Donald, Harris English,…