Scottie Scheffler revealed he had a "weird little injury" after playing the 150th Open at St Andrews.
The World No.1, who has taken a five-shot lead at the Tour Championship at East Lake, explained that he developed a pilonidal infection.
Scheffler told the media after his opening 5-under 65 in Atlanta that this "is an infection at the top of your butt crack."
"Probably TMI," Scheffler joked, who is trying to win for the fifth time this season at the finale of the $75m FedEx Cup Playoffs.
The Masters champion explained that the injury was "brutal" and it was "really hard to bend down". "It's just one of those things that happens," he said.
It was reportedly so bad that he was struggling to make a golf swing. We did wonder why he looked out of sorts at the FedEx St. Jude Championship.
HERE'S THE FULL EXCHANGE
Q. What do you think allowed you to bounce back quickly from the missed cut in Memphis? (At the FedEx St. Jude Championship)
SCOTTIE SCHEFFLER: "You know, I really wasn't playing bad. I played good at the Open. I had kind of a weird little injury thing that prevented me from playing my best on Saturday and Sunday, and then I was -- if not for that, I would have felt like I had a really good chance to win the tournament.
"Then going into Memphis I just had one really, really bad day. I don't know what happened. I have no idea. Kind of just put it out of my mind and got into Wilmington [at the BMW Championship] and got some good work in and then had a solid week last week and had a good start to the week this week.
Q. What was the weird little injury?
SCOTTIE SCHEFFLER: "Probably TMI, but I had what's called a pilonidal infection. It's an infection at the top of your butt crack. You can look it up. It was really hard for me to bend down. It was really hard for me to make a swing on Sunday. Walking was actually extremely difficult.
"I don't know if any of you have ever had something like that, but if you talk to someone that does it is excruciatingly painful. It was brutal. It's one of those things that just happens --"
Yeah, Scottie, you were right the first time.