According to reports earlier in the week, the 2012 and 2014 Masters champion will join the LIV Golf circuit.
Six Masters winners have defected from the PGA Tour to the European Tour.
Greg Norman, CEO of LIV Golf, described the risk-taker as a "risk-taker who has solidified his name among the world's very best"
While he will attend the next tournament in Boston, he won't be able to because of his knee injury.
The most popular golfer of all time, but hasn't won a PGA Tour event in over a year. He hasn't played on the tour since May due to an injury. Many of the other most notable players in LIV Golf are well into their 40s and beyond, but LIV Golf has made a clear recruiting pitch to target some of the game's most accomplished players.
If other defectors will play in the Masters. It is not likely that the Augusta National Golf Club will reverse their policy of lifetime qualification for former winners, though other majors may try to keep out many LIV Golf players.
There is a reason 9/11 activism is scaring Trump over his golf backing.
The world's highest-paid golfers are shuffled around.