Reed saw his 54-hole lead slip away early Sunday by making two bogeys in his first three holes. However, the 29-year-old played a bogey-free, 2-under back nine alongside Ancer, who made the tournament interesting until the final putt.
The victory at Liberty National Golf Club marks his seventh on the PGA Tour and first since the 2018 Masters.
Here's how the top of the leaderboard finished:
|Place||Player||To Par||R4 Score|
|T3||Harold Varner III||-14||68|
Jon Rahm held the lead for a short while thanks to three birdies on the front nine but took himself out of the top spot with back-to-back bogeys on Nos. 14 and 15.
Adam Scott, who won at Liberty National in 2013, fired the low round of the day with a 6-under 65 to climb inside the top five.
With leg one of the FedEx Cup Playoffs completed, the top 70 on the points list advance to next week's BMW Championship. Sergio Garica, Matthew Wolff, and Bubba Watson are notables whose seasons are over after failing to qualify.