East Yorkshire golfer David Lynn set the early pace after carding an opening 68 on his Masters debut at Augusta National.
Playing only the third major of his career after securing his place by finishing second at the US PGA Championship last year, Lynn, from Kirk Ella, carded six birdies and two bogeys to set the early clubhouse target.
And although he was subsequently overhauled, the world number 53 could have no complaints after a round which saw him finish ahead of more high-profile compatriots Lee Westwood and Justin Rose, who were both round in 70.
The 39-year-old, whose partner Sally Moore is a director of her family's Hull-based security business, has just one win in almost 400 European Tour events, birdied the first, eighth and ninth to be out in 33, and after a dropped shot on the 10th, hit back with birdies on the 11th, 12th and 15th.
A bogey on the 17th looked like being followed with another on the 18th when he was faced with a 12ft putt for par after hitting his approach over the green, but he holed out to complete a brilliant debut round.