The main reason I said many years ago, when Tiger Woods officially hooked up with Sean Foley (he’d actually been seeing him on the sly for at least six months before breaking with Hank Haney) that he was going to break his back was because of his changed setup.
He changed from his right-to-center bias that you saw in his early years to what Foley was teaching, which was a Stack & Tilt type setup by any other name.
WAX Golf 