A driver model that for years sat at the edge of Titleist's tour bag rotation has quietly become the most talked-about head on the PGA Tour, and the company's new GTS4 is doing it without any of the marketing weight of its bigger siblings. Four players have already signed off on it in the first five weeks since launch, double the count its predecessor managed across an entire season, and the buzz is being driven less by long bombers than by short-iron tacticians.
GOLF.com Tour Report's weekly Fully Equipped column flagged the model as Titleist's most intriguing GTS this week, citing both who is using it and how the design has shifted to capture a wider band of players. Patrick Cantlay, Davis Riley, Zac Blair and Frankie Capan III have all moved into the new head, with Cantlay debuting his at the RBC Heritage at Harbour Town earlier in April.
The GTS4 is designed as a low-spin, sub-460cc option that Titleist has historically pitched at downward-attack-angle players who chase a steady, penetrating ball flight rather than maximum carry. Past iterations of the "4" have measured between 430cc and 440cc and have been almost a niche product within the company's tour stable. The new GTS4 maintains that compact philosophy but, by all accounts, is appreciably bigger at address, blurring the line between the standard GTS3 and the fully bespoke GT4.
"Isn't quite as small," Riley told GolfWRX when asked the obvious comparison question between the GT4 and GTS4. The Mississippi-born tour winner is one of the early converts and represents the kind of mid-launch, mid-spin profile the previous head was always thought to scare off.
Titleist has not formally confirmed the volume of the new head, leaving fitters and equipment trackers to estimate based on profile photographs taken during the launch event in Houston last month. The reduced footprint relative to the GTS3 still gives players the workability that has long made compact heads attractive to those who routinely shape both ways, but the larger profile lifts MOI and forgiveness, the missing ingredients in past Titleist 4-spec drivers.
The pickup figures matter because Titleist drivers, despite a fitter-friendly fitting network and a successful run since the GT line introduced in late 2024, lag behind TaylorMade and Callaway on raw counts in many fields. Doubling GT4 usage in five weeks is a small absolute number but a large percentage shift, and the names involved suggest Titleist's tour staff is pushing the head as a meaningful step rather than a niche refresh.
Cantlay's decision is the most striking. The eight-time PGA Tour winner has historically tinkered between heads but rarely makes a permanent change without weeks of testing in low-pressure events, and his switch at Harbour Town came with little fanfare. He missed the cut in his second start with the new head at the Cadillac Championship's predecessor week, and his ball-speed numbers were unchanged, but his sentiment around the head has been positive.
Capan III has been similarly optimistic. The young pro, who turned heads with a 12-under round on the Korn Ferry Tour in 2023, traditionally favours larger-volume heads but says the GTS4's slight increase from the GT4 made it a comfortable bridge. Blair, a known equipment perfectionist, has taken on the head as his gamer for the Zurich Classic alongside partner Tom Hoge.
Tour adoption is the loudest endorsement Titleist can get for a model that does not enjoy the marketing dollars of the GTS3, and the GTS4's quiet inroads suggest that the head's positioning, neither too small nor too big, is connecting with the bracket of players the brand has long struggled to convert. Whether that translates into a wholesale shake-up of Titleist's tour roster will be clear in time. For now, the company has the most interesting niche driver on the PGA Tour, and the names testing it suggest the head is well on its way to leaving niche territory.
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*Originally published on [Golf News Global](https://golfnews.global/article/titleist-gts4-driver-tour-cantlay-riley-blair-capan-most-intriguing-2026). Visit for full coverage.*
