Summary
Winning the WGC-Bridgestone Invitational Sunday had put Justin Thomas in a "great place mentally," with the timing perfect as he gears up to defend the PGA Championship title.
Thomas started the final round with a three-shot cushion and was never seriously challenged, a 1-under-par 69 more than enough to clinch his first World golf Championships event and ninth PGA Tour title.
Rory McIlroy made three straight bogeys around the turn, carded 73 and finished seven shots behind, while Ian Poulter putted uncharacteristically poorly and was never a factor after four bogeys in the first seven holes.
Day crept within two shots after three successive birdies from the 10th hole, only to drop five shots in the next five holes and shoot 73 .
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