And that certain someone let his presence be known at Glen Oaks. Johnson played bogey-free in the final round, and played his final 29 holes at par or better.
"I was hoping it wasn't going to be that much fun", he said, adding: "It's very hard holding a lead on a hard golf course when the guy you're playing with goes bogey-free and doesn't even really sniff a bogey and shoots four under".
Suri then struck the decisive blow with a birdie from 20 feet on the 15th and victory was assured when Horsey lost a ball following a wild drive on the 18th and found a water hazard with his second attempt.
Even without his best year with his best club, Spieth has won three times and captured the third leg of the Grand Slam. He engaged with Johnson on a back-nine battle, making two birds and a remarkable par save at the 17th.
Spieth began the round with a three-stroke lead before shooting a 1-under 69 that left him 13 under for the tournament. But I was able to turn it around. The American, who has been playing on the Challenge Tour this season, earns automatic promotion after finishing on 19 under par to secure his first victory in just his seventh European Tour event.
Michelle Wie withdrew from the LPGA's Canadian Pacific Women's Open on Sunday to undergo emergency surgery to remove her appendix. Wie was tied for 23rd, six strokes back entering the day. A theoretical victory would make the two-time major victor the oldest champ in European Tour history.
Jason Day's sixth-place finish moved him to No. 29 in the FedExCup standings.
In his 16 victories on the PGA Tour, only one other time had he made a birdie on the final hole to win by one shot.
There's always a host of sob stories regarding players missing out on their tour cards.
After winning the PGA Championship in Charlotte, North Carolina, Justin Thomas seemed to have locked up the PGA Tour Player of the Year award, and officially gotten out from underneath Spieth's shadow.
William McGirt, Patton Kizzire, Cody Gribble, Branden Grace and Michael Kim are the last five players who made it into the top 100, while Scott Stallings, Byeong Hun An, Martin Flores, D.A. Points and Luke Donald are the first five players out. Kuchar ran off four straight birdies and kept right on rolling, ending his round of 64 with eight birdies on the last 10 holes.