Cameron Young says his self-belief is continuing to build after cruising to a dominant wire-to-wire victory at the Cadillac Championship on Sunday.

Young topped the leaderboard by six shots at Trump National Doral Miami, having held the lead throughout by maintaining a high level from the very first round.

It is the second-highest winning margin by a player on the PGA Tour this year, with only Justin Rose's seven-shot victory at the Farmers Insurance Open in January beating it.

Young's four-under 68 saw him finish the tournament on 19-under, which was more than enough to hold off world number one Scottie Scheffler's late surge, despite two bogeys on the back nine.

Scheffler struggled with his putting for most of the round but carded three birdies on his final four holes to finish on 13-under par and snatch second, ahead of Benjamin Griffin (12-under).

"I think the self-belief just continues to build," Young, who has now won three PGA titles, said.

"I put myself in plenty of good places over the course of the last four, five years. Recently, I've started to come out on the better side of it.

"So, yeah, just excited for the next few weeks and moving on toward Charlotte and the PGA."

Consider the floodgates *opened* pic.twitter.com/VdHqVDSBsf

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On the second hole, Young was given a penalty stroke for making his ball move after grounding his club while addressing a shot, but called over the rules official himself to take responsibility for the error.

"It's just one of those, your heart sinks when you see it move, but it moved, and that's part of what golf's about," Young added.

"There was no one who was going to give me a penalty there but myself, and I think I had about four of those on the PGA Tour now, so I need to start setting the club down a little softer.

"Really unfortunate, and I really would like to have the one back that I had to give there, but at the end of the day, if I had to pick a time to give one back, it just wasn't the worst time."

As for Scheffler, it is the third time in as many weeks that he has finished as a runner-up on the PGA Tour, having lost to Rory McIlroy at The Masters before being beaten by Matt Fitzpatrick in a play-off at RBC Heritage.

"I felt like I couldn't really get anything going," Scheffler said. "I was hitting it decent enough.

"Just putts were going kind of around the hole. Tough to get a lot of momentum. I hit it pretty nicely to start; just didn't hole the putts I needed to.

"I made a little bit of a sloppy bogey on hole nine, where I felt like I hit a good bunker shot and a good putt, and just little stuff like that.

"I just didn't really get enough momentum going. Wasn't hitting it close enough and wasn't holing those 15 to 20-footers when I needed them."