Americans Joe Ogilvie and Nick Watney, Indian Arjun Atwal, and Australian Jason Day sit a top the AT&T National leaderboard midway through the first round of play with clubhouse leads of 4-under 66's on the day.
Tiger Woods, the host of the annual ATT&T National Tournament, shot a 1-under par on the front nine. Sean O'Hair, a member at Aronimink Golf Club, was thought to have the upper hand over the field given his familiarity with the course but, he finished the day with a 1-over 71.
All golfers have teed off but there is still a long way to go before the dust settles on round one.