The Collin Morikawa-Joe Greiner experiment is over after just five tournaments. The world No. 5 is using a friend on the bag at the Rocket Classic.

Greiner, who was Max Homa’s longtime caddie, worked a couple tournaments filling in for Justin Thomas’ regular caddie, Matt Minister, including at Harbour Town, where Thomas won.

Morikawa hired Greiner after parting ways with Jakovac following the RBC Heritage in late April. Greiner, who was Max Homa’s longtime caddie, worked a couple tournaments filling in for Justin Thomas’ ...

Collin Morikawa is once again making a change on the bag ahead of this week's Rocket Classic in Detroit. After parting ways ...

Morikawa linked up with Greiner in April. Greiner was coming off a successful two-tournament fill-in stint with Justin Thomas, helping him win the RBC Heritage.

Greiner split with Max Homa in late March and was an 11 th -hour replacement on the bag for Justin Thomas at the Masters.

Collin Morikawa first faced some heat in April when he announced the split with long-term caddie J.J. Jakovac. The World No.5 golfer soon hired Joe Greiner, who worked with Max Homa until early April ...

Justin Thomas playfully teased his good friend and fellow golfer Max Homa in his Instagram comments after Homa finished 5th ...

"I think Joe is an amazing caddie ... After splitting with Homa, Greiner was a fill-in caddie for Justin Thomas at the Masters and the RBC Heritage, which Thomas won to end a nearly three-year winless ...

Max Homa has been struggling for form this season and his world ranking has plummeted as a result, with the American looking ...

Morikawa has yet to name a permanent caddie but will have a notable name on his bag during a crucial period of the season ...