Who is Bryson DeChambeau?

Bryson DeChambeau, who has a share of the first-round lead at the Masters, is one of the most recognisable and idiosyncratic players in the modern game.

Here, Press Association Sport profiles an intriguing and, at times, controversial character.

Who is he?

What is his scientific approach?

This is seen most notably in his clubs. All his irons are custom made to the same length. This was an approach he discovered himself when he was 17, having experimented by sawing down a set of iron shafts. He feels this helps him maintain a consistent swing. Having been brilliant at maths and science at school, he keenly studies all aspects of the game and is regularly looking for new techniques to give him the edge. These include a method he calls ‘vector putting’ to calculate the pace and break of a putt.

Has he taken it to a new level at Augusta?

DeChambeau seems willing to try all sorts of things. “I don’t really take days off, my brain doesn’t let me,” he says.  Following recent rule changes, he has regularly kept the flag stick in while on the greens and he has experimented with the ‘side-saddle’ putting style in the past. He also spoken about the importance of breathing techniques. On arrival at the Masters this week, he seemed intent on taking things up a notch. He put in some marathon stints on the range and tested numerous different shafts in search of a winning formula. He felt he had found something, and his six-under-par first-round 66 does not contradict that.

But not everyone is a fan are they?