Collin Morikawa is making a significant change, replacing longtime caddie JJ Jakovac with Joe Greiner, according to golf reporter Paul Hodowanic.
The shuffle is a big one for the two-time major winner, who has worked with Jakovac since he turned pro in 2019. He has been Morikawa’s caddie for all six of his win on the PGA TOUR, including the 2020 PGA Championship and the 2021 Open Championship.
Greiner spent the last six years caddying for Max Homa until the two split in early April. He then caddied for Justin Thomas at the Masters and was on the bag for his win at the RBC Heritage two weekends ago.
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Morikawa appears to be trying to shake things up after his recent struggles. While he’s finished in the top 10 at a number of events, he hasn’t won on the PGA Tour since the 2023 ZOZO Championship.
Here’s what to know about Morikawa’s new caddie, Joe Greiner.
MORE: Where is Collin Morikawa from?
Who is Collin Morikawa’s caddie?
Morikawa has tabbed Joe Greiner as his new caddie.
The two have a strong familiarity with each other, as they both grew up in California and became friends on the PGA TOUR. Homa and Morikawa have competed together on the U.S. team at the 2023 Ryder Cup team and 2024 Presidents Cup and were teammates at the 2023 Zurich Classic of New Orleans.
Greiner’s immediate success with Thomas at the RBC Heritage makes this an interesting move, as Morikawa hopes to jump-start his game. The two will compete for the first time together at the Truist Championship in Philadelphia in two weeks.
Who is Joe Greiner?
Joe Greiner has been Max Homa’s caddie for the last six years and won six times with the golfer. He helped Homa clinch the Wells Fargo Championship in 2019 for his first victory on the PGA Tour before a two-year run of sustained success.
Homa won his hometown Genesis Invitational and the Fortinet Championship in 2021, and he captured the Wells Fargo and Fortinet Championships again in 2022.
Why did Max Homa split with Joe Greiner?
Homa and Greiner parted ways because of a slump by the golfer that began in 2024. The two are very close friends, and it was Greiner who initiated the split to preserve their friendship.
“We always had a deal that we’re friends first and friendship mattered more than the work thing, and he was wise enough to do what he did,” Homa said, per Sean Martin. “It’s hard, … but I was happy that he did it. … I would rather walk life with Joe forever than this dumb game. So it’s been hard to process, but also good in a way, because friendship does matter more than any of this stuff.”
Homa had missed four straight cuts prior to the split and was having a dreadful start to 2025 overall. He withdrew from the Farmers Insurance Open and finished tied for 53rd at the At&T Pebble Beach Pro-Am. He did finish tied for 12th at the Masters following the switch.
