Johnson was playing at such a high level that when Casey holed a 25-foot eagle putt on the 15th hole to get within one shot, he knew Johnson was going to make his eagle putt from 18 feet to match him.
When it was over, Johnson had a 5-under 67, a three-shot victory, the No.
His peers on the PGA Tour will be asked to judge him in a few weeks when they receive their ballots for player of the year, and the 32-year-old Johnson might have sealed it with the way he won at Crooked Stick.
He tied Jason Day with his third victory this season, the difference being Johnson won a major.
Open last year at Chambers Bay, his ball for reasons unknown stayed up on a ridge, and his 12-foot eagle putt for the victory turning to a three-putt par to finish one shot behind Jordan Spieth.
Even as everything seemed to go wrong, Johnson kept winning.
He has won at least one PGA Tour event every season since he went straight from Coastal Carolina to PGA Tour qualifying school to winning in 2008.
He now has 12 victories on the PGA Tour over the last nine years, a total topped only by Tiger Woods.
2 in the world behind Day, and he likely will not make up any more ground the rest of the year because he’ll only play a couple more events.
“I’ve still got to go out and play some really good golf,” Johnson said.