Yun, of Chandler, Ariz., won the Verizon Junior Heritage in a playoff over Julian Suri.
Yun finished regulation at 1-under 142 (68-74) at Sea Pines Resort’s Ocean Course and Harbour Town Golf Links in Hilton Head Island, S.C.
Yun is No. 61 in the Golfweek/Titleist Junior Rankings.
• Taiwan’s Cheng Tsung Pan shot 1-under 143 (73-70) to win the FCWT Mission Inn Open by one shot. Pan, a quarterfinalist at the 2007 U.S. Amateur, has won two FCWT titles in three starts.
• Tyler Weworski, of Carlsbad, Calif., shot 1-under 143 (71-72) to win the FCWT La Costa Classic by four shots. Weworski, No. 216 in the Golfweek/Titleist Junior Rankings, was 4 over par after five holes in the final round, but made birdie on four of his final 11 holes.
• Spencer Lawson, of Raleigh, N.C., shot 8-over 152 (73-79) to win an IJGT event at Amelia Island (Fla.) Plantation by three shots. Lawson is No. 315 in the Golfweek/Titleist Junior Rankings.