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 gone back to his golfing days at Cal to select a new caddie. Morikawa announced on Wednesday that KK Limbhasut, who was Morikawa’s teammate on Cal’s golf team for three years, will be his caddie for this weekend’s Rocket Classic at the Detroit Golf Club.