The tour debut of the new TSi drivers marks the start of Titleist’s tour seeding and validation process. Titleist drivers have been the #1 choice of players on the PGA Tour for the past two seasons, and the new TSi drivers are off to a fast start making Titleist the most played drivers at the 120th U.S. Open Championship.Gathering feedback from the game’s best players throughout the R&D process and then earning their final validation are critical elements in the development of all high-performance Titleist golf equipment.TSi3 - Dynamic DistanceFor players who create more consistent contact and require more precise control over CG placement. With a new Adjustable CG Track Design for advanced speed-tuned performance.