Phil Mickelson, now 55 years old, has been one of the most recognizable faces in golf for over three decades, ever since bursting onto the scene with his debut at the U.S. Open in 1992. Whether it was his magnetic personality, distinctive left-handed swing, or remarkable consistency on the PGA Tour, Mickelson has firmly cemented himself among the greatest to ever play the game. During a recent round of golf with YouTuber Grant Horvat, Mickelson opened up about how his putter earned the nickname “Tiger Slayer,” a title he’s even written on its cover.