Cary Middlecoff took control of the 1955 Masters in the second round, when he carded a 65, and then cruised to the victory by seven strokes.
That 7-stroke margin of victory (over Ben Hogan) was a new tournament record (which lasted until the 1965 Masters). The 31 that Middlecoff scored on the front nine during that second-round 65 was also a record at the time.
Middlecoff won 40 times on the PGA Tour, including three majors, and this was the middle victory among those three majors. For Hogan, it was his fourth runner-up finish in The Masters, which established a new record, later tied, for second-places finishes.