Which Argentine signed an incorrect 1968 Masters scorecard, costing himself a playoff?

Roberto De Vicenzo signed the incorrect 1968 Masters scorecard that cost him a playoff.

De Vicenzo, an Argentine and the reigning British Open champion, had birdied the 17th hole during the final round. His playing partner, Tommy Aaron, recorded a par 4 instead of the correct birdie 3. De Vicenzo failed to notice the mistake and signed the card.

Under the golf rules in force at the time, a player was responsible for the scorecard submitted and signed. When a higher score was recorded for a hole, that higher score had to stand. The extra stroke left De Vicenzo with a final score of 278 rather than 277, placing him one stroke behind Bob Goalby.

Without the error, De Vicenzo and Goalby would have tied and played an 18-hole Monday playoff. The episode remains one of the Masters’ most famous controversies. De Vicenzo’s frustrated remark, “What a stupid I am,” became closely associated with the incident.