Williamson, who qualified for the major championship with a 16th place finish in the PGA Professional Championship in June, is currently tied for 110th with the likes of one Tiger Woods. Both players finished the day with four bogeys and a birdie.Williamson played in a threesome with Scott Stallings and Matteo Manassero, both of whom are regular players on the PGA Tour. Stallings shot an even-par 70 while Manassero turned in an 8-over 80 after a miserable back nine that included three double bogeys.[READ: Dufner withdraws from PGA Championship due to neck injury]
Williamson is currently 10 shots behind the trio of players tied atop the leaderboard at 6-under. Lee Westwood, Kevin Chappell and Ryan Palmer all shot 65 to set the pace for the rest of the field.Defending champ Jason Dufner was forced to withdraw from the tournament with a nagging neck injury. Earlier in the week, the 37-year-old said that he was partly to blame for the injury for not staying in good playing shape. Dufner bowed out of the championship after a triple bogey on No. 10.