Inside Callaway's dash to create Phil Mickelson's 47.9" driver for the PGA (

Phil Mickelson and Callaway had a vision in mind for the 2021 Masters — and it involved the five-time major winner quietly working his way into a 48-inch driver to gain an edge off the tee. If the story sounds familiar, it’s because Mickelson used a 47.5-inch Callaway Mavrik Sub Zero driver five months prior at Augusta in a move that was spurred on by Bryson DeChambeau’s race to employ a similar club at the event.

Mickelson beat DeChambeau to the punch that week, but the driver never seemed to give him an advantage.

“Switching to the 48-inch driver, Phil got progressively longer,” said Jacob Davidson, Callaway’s PGA Tour manager. “But from a design standpoint, it’s sort of been a moving target where originally we didn’t quite have something that was made back a year-and-a-half ago when we were designing these models to be that low lofted and really perform at the optimal levels for a 48-inch driver shaft.”

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