Daniel Berger, the defending champion of the Pebble Beach AT&T Pro-Am, has been forced to withdraw from the competition.
Berger, 28, will not play after injuring his back according to the tour's official communications department.
He has been replaced in the field by Kevin Stadler. Only this week Berger reflected on what that win did for him last year.
Berger, who starred in the Ryder Cup for the United States at Whistling Straits, said it helped him change his mindset.
He hit the headlines last week when he revealed he has been using his 2011 irons and is still purchasing equipment off eBay.
Berger said: "Yeah, you know, I've used that -- I actually started with that set of irons when I was in high school in 2011 and I've just stuck with them. I stuck with them in college, I stuck with them early on in my career as a professional on the Korn Ferry and then early on on the PGA Tour.
"And I've just done a bunch of testing and it's the best iron for me. So I don't see why I need to go out there and look for something else.
"And there are sets available on-line and people have reached out to me, so I've got an extremely large amount of backup sets sitting at my house.
"And I think if I were to do it right I would have a set at home that I would use to practice and a set at home that I would play or a set on the road that I would use to play.
"But like I said, I have plenty of clubs right now to last me for awhile and until something else comes out that is better I'm going to stick with what I have."
Berger memorably won at Pebble Beach by making a 30-foot eagle putt at the 18th.
He claimed that 3-wood he hit into the green with his second shot was perhaps the "best of my life."