Sam Burns earned his maiden PGA Tour title after winning the Valspar Championship by three strokes.

Burns and 2011 US PGA Championship winner Keegan Bradley had been level atop the leaderboard through the second and third rounds in Palm Harbor, Florida.

But Burns broke the deadlock with his fellow American on Sunday courtesy of a three-under-par 68 at Innisbrook Resort and Golf Club.

Burns mixed six birdies with three bogeys in the final round as the 24-year-old improved to 17 under and became the second youngest winner in Valspar Championship history.

He also became the fifth player to claim his first Tour title at the tournament, with Adam Hadwin the last to do so in 2017.

An even-par 71 saw Bradley drop down into sole possession of second spot – the four-time Tour champion's seventh runner-up finish in 273 starts.

It all turned sour for Bradley on the back nine, where he found water on the par-three 13th hole, leading to a double bogey. Burns birdied the 14th to open up a three-shot advantage and never looked back.

Viktor Hovland (65) and Cameron Tringale (68) finished tied for third – four strokes behind Burns, while American star Justin Thomas (70) earned a share of 13th position, six shots further back.

Two-time defending champion after the 2020 event was cancelled due to the coronavirus pandemic, Paul Casey's bid for a three-peat ended following his final-round 68, which left him tied for 21st.

World number one Dustin Johnson, meanwhile, closed out the tournament 15 strokes adrift after his two-under-par 69.

Keegan Bradley and Sam Burns remained tied for the lead through three rounds at the Valspar Championship, where world number one Dustin Johnson fell down the standings.

Level atop the leaderboard at the tournament's halfway stage, American pair Bradley and Burns were again locked together on 14 under following Saturday's penultimate round in Palm Harbor, Florida.

Bradley, who won the 2011 US PGA Championship, and Burns both carded two-under-par 69s to be a stroke clear of charging countryman Max Homa at Innisbrook Resort and Golf Club.

Burns – eyeing his maiden PGA Tour title – held a commanding three-stroke lead after Bradley bogeyed the 13th hole, but the latter chipped in for an eagle to cut the deficit to just one shot.

A Burns bogey on the par-four 16th left the duo deadlocked again before the pair exchanged bogeys at the last to head into the final round as the men to beat through 54 holes.

It is Burns' third 54-hole lead/co-lead of the season, level with Jordan Spieth for the most on the PGA Tour.

The last time Burns held the 54-hole lead/co-lead on tour, Homa came from behind to win the 2021 Genesis Invitational and the latter is once again looming large.

Homa, who posted a third-round 66, is looking to become the third player to win multiple titles during the 2020-21 season, joining Bryson DeChambeau and Stewart Cink.

American star Justin Thomas shot a four-under-par 67 to catapult himself into a tie for 18th, eight shots off the pace.

Johnson, meanwhile, struggled to a three-over 74 on day three of the event.

There was a dreadful end to the round for Johnson, who had two double-bogeys from his final three holes to crash down to even par for the tournament – 14 strokes behind Bradley and Burns.

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