Prior to Greiner, J.J. Jakovac served as Morikawa's caddie from 2019 until their split in April. Jakovac was on the bag for each of Morikawa's six PGA Tour wins, including The Open in 2021 and a PGA Championship in 2020.

Collin Morikawa has broken up with caddie Joe Greiner after just five tournaments. He explained why at the Rocket on Wednesday.

“Ask me anything you want in my press conference later, I’m with my pro-am partners now,” Morikawa was quoted saying in Schupak’s report, which has since been updated to include the golfer’s most recent comments, according to Awful Announcing.