The morning wave Thursday at the FedEx St. Jude Classic featured a trio 4-under 66s from co-leaders John Merrick, Kris Blanks and Kevin Kisner. Players in the afternoon groups have come close, but no one has yet reached that 4-under mark. Four players, however, are currently at 3-under with time left to move up the leaderboard. Rising fast is Boo Weekley, who was 3 over through four holes, but 6 under for his last 12 to get to 3 under with two holes to play. Robert Karlsson just birdied No. 14 to get back to 3 under. Kent Jones and David Mathis are also one shot off the lead with seven and eight holes remaining respectively.