WASHINGTON: Jason Kokrak held off home-region hero Jordan Spieth down the final holes Sunday (May 31) to win the US PGA Tour Charles Schwab Challenge by two strokes. The 36-year-old American fired a level par 70 in Sunday's final round to finish 72 holes on 14-under 266 at Colonial Country Club in Fort Worth, Texas. Kokrak stumbled with bogeys at the par-4 15th and par-3 16th but closed with back-to-back pars to deny Spieth, who had ended a four-year win drought last month