Si Woo Kim opens 3-stroke lead in Wyndham Championship

Si Woo Kim tips his hat to the crowd after finishing the 18th hole during the third round of the Wyndham Championship golf tournament in Greensboro, N.C., Saturday, Aug. 20, 2016. (AP Photo/Chuck Burton) (The Associated Press)

Si Woo Kim watches his approach shot on the ninth hole during the third round of the Wyndham Championship golf tournament in Greensboro, N.C., Saturday, Aug. 20, 2016. (AP Photo/Chuck Burton) (The Associated Press)

Luke Donald gestures after his putt on the first hole hole during the third round of the Wyndham Championship golf tournament in Greensboro, N.C., Saturday, Aug. 20, 2016. (AP Photo/Chuck Burton) (The Associated Press)

Si Woo Kim followed his tournament-record 10-under 60 with a 64 on Saturday to increase his lead to three strokes in the Wyndham Championship.

The 21-year-old South Korean player had an 18-under 192 total at Sedgefield, a stroke off the tournament 54-hole record set by Carl Pettersson in his 2008 victory.

Kim is in contention for his first PGA Tour victory for the second time in a month after losing a playoff to Aaron Baddeley in Alabama in the Barbasol Championship.

Kim played the front nine in 3-under 35 with four birdies and a bogey, added birdies on the par-4 13th and par-5 15th and parred the final three holes.

Rafa Cabrera Bello was second after a 65 in the PGA Tour's regular-season finale. The Spaniard was fifth last week in the Rio Olympics.

Jim Furyk, Luke Donald and Kevin Na were 13 under.