The 1991 Masters Tournament was the 55th Masters Tournament held April 11–14 at Augusta National Golf Club in Augusta, Georgia. Ian Woosnam won his only major title, one stroke ahead of runner-up José María Olazábal. It was the fourth consecutive year that the Masters champion was from the United Kingdom, which had no winners prior to Sandy Lyle's victory in 1988. Through 2017, Woosnam is the only winner at Augusta from Wales. Olazábal later won two Masters, in 1994 and 1999. Phil Mickelson, a 20-year-old junior at Arizona State, was the low amateur at 290 (+2) and tied for 46th place.