Which Callaway driver is best? Callaway has long been one of the most respected names in golf equipment. Like many manufacturers, Callaway has a staff of professional golfers who use and endorse their clubs, balls and golf peripherals. Three of the top players on the team that uses Callaway drivers are Jon Rahm, the top-ranked player in the world, Phil Mickelson and the 2020 Olympic gold medal winner, Xander Schauffle. Few play golf anywhere near the level of these three, but many share their equipment preference because they know Callaway uses only the finest materials and craftsmanship in their drivers.