What it means: Believe it or not, this is Fowler's first 54-hole lead on the PGA Tour since 2011. He collected his first PGA Tour trophy at Quail Hollow in 2012 and then went three years without another. Now the fifth-ranked player in the world is seeking his third PGA Tour victory in the last 12 months and his fifth worldwide win over that same stretch. One shot behind Fowler sits Castro, whose best finish on Tour is a runner-up at the 2013 Quicken Loans National. A win Sunday would get Castro into next week's Players Championship at TPC Sawgrass, where he owns a share of the course record on both the Stadium and Valley courses. Loupe, the 18- and 36-hole leader, teed off on 18 at even par for the day before a closing double bogey dropped him three shots back.
Round of the day: Fowler bookended his only dropped shots of the day at 11 and 13 with streaks of three birdies in a row on Nos. 8-10 and 14-16. The latter run got off to an entertaining start when Fowler two-putted for a birdie-3 after driving the par-4 14th green. Hahn tied Fowler for the low round of the day with a 68 of his own. He had missed his last eight cuts in a row and now finds himself in contention for his second Tour title in as many seasons.
Best of the rest: Justin Rose went out in 1-under 35 and made two birdies across a bogey-free back nine to shoot 3-under 69. Rose, two back, has won at least one Tour title every year since 2010, a streak he'd continue with a win tomorrow. He was tied at 3-under on Saturday by Fabian Gomez and Dawie van der Walt.
Biggest disappointment: Like Fowler, Phil Mickelson started the day three shots back. He'll start Sunday eight behind after a third-round 76 that featured trips into the water at Nos. 16 and 18. Lefty finished bogey-birdie-quadruple bogey and melted down after hitting his second shot at the home hole into the creek left of the green.
Shot of the day: Rory McIlroy traded birdies and bogeys all day in a 1-over round of 73, but he walked off the course on a high note thanks to this 79-foot, bending birdie make at the par-3 17th.
The defending champion will start the final round eight back.