-- Thomas to finish in a three-way tie for third or worse. He is tied for fourth. Check.
-- Dustin Johnson to finish in a three-way tie for second or worse. He is tied for 13th. Check.
-- Marc Leishman to finish in a two-way tie for second or worse. He is tied for 22. Check.
-- John Rahm to finish second or worse. He is tied for seventh. Check.
"I have no issue," Casey said on the prospect of winning the FedEx Cup after winning only one tournament.
Casey's margin headed into the final round is slim. It appeared he was going to run away with the tournament early in his third round. Casey went 5 under par in a stretch of five holes, Nos. 3-7, with an eagle, three birdies and a par. Casey stood at 12 under par, four strokes ahead of the closest competitor. The lead would be gone in two holes.
However, as was the case Friday, East Lake fought back. Casey had back-to-back bogeys on Nos. 8 and 9. Kisner and Koepka made moves, and the three were tied at 10 under as Casey made the turn.
Casey birded No. 11 to regain the lead and held the advantage the rest of the afternoon. Another birdie at No. 17 gave him a two-shot cushion.
Casey has fared well at the Tour Championship with two fourth-place finishes and one fifth-place finish. He shot a final-round 64 last year, but it was not enough.
Kisner shot the low round of the day and tournament with a 6-under 64. The former University of Georgia golfer said little following his round, as he raced to catch a helicopter flight to Athens to watch the Bulldogs play Mississippi State in a college football game.