Jack Nicklaus’ 18 wins in majors might not be in any danger from Tiger Woods, who missed the entire 2016 season after back surgery.

Stuck on 14 majors, his last coming in 2008 at the U.S. Open, Woods was aiming for a complete comeback in time for the Masters this year, but back spasms have forced him to withdraw from the next two PGA events. Those would have been the Genesis Open and the Honda Classic, which he last won 20 years ago.

He was also forced to withdraw from last week’s Dubai Desert Classic after just one round due to the spasms. He hobbled around the course, shooting a disappointing 77, noticeably grimacing numerous times on various swings.

“My doctors have advised me not to play the next two weeks, to continue my treatment, and to let my back calm down,” Woods said in a statement. “This is not what I was hoping for or expecting. I am extremely disappointed to miss the Genesis Open, a tournament that benefits my foundation, and the Honda Classic, my hometown event. I would like to thank Genesis for their support, and I know we will have an outstanding week.”

Woods had earlier announced an ambitious schedule that would have seen him participate in four events in five weeks, starting with the Farmers Insurance Open at Torrey Pines two weeks ago. He missed the at the Farmers, and then promptly got on the plane for a 17-hour flight to Dubai, only to have that tourney conclude early too.