Martin Laird insists he never even contemplated failing to win the Arnold Palmer Invitational after a courageous one shot win.
Laird started the day two shots clear but appeared to have squandered his chance when he found the water en route to a double bogey at the 11th.
But three birdies from then on and a brave two-putt at the last saw him hold off Steve Marino by one stroke to win at eight under, adding to fellow Scot Paul Lawrie's triumph in Spain.
Laird said: "I don't know if I was nervous.
"I thought in the morning that I've let a few tournaments go and I came out today, I wasn't joking around - this was going to be my tournament to win, and I felt comfortable.
"I never thought about not winning. At three down I didn't have a choice, I had to make birdies - Steve was playing so well and he wasn't going to drop all the way back to where I was.
"That was the focus - not a place finish, I was out there trying to get this trophy."
Birdies at the sixth, ninth and tenth had taken Marino ahead as Laird faltered. The Scot did well to save pars at the first two holes but went through the green at the next and dropped a shot.
A 15 foot putt from the fringe saved par at the fifth but he three-putted the par three seventh and a bogey at nine followed before the problems at the 11th.
Marino led by three at nine under at that stage, but he struggled with a string of challenging pin placements over the tough closing holes as Bay Hill showed its teeth.
Laird had recovered from the 11th with a birdie at the 12th - with his eagle putt only just diving past the hole. He bogeyed the 14th after missing a short putt but birdied the next after holing from 20 feet.
He went through the 16th green into a bunker and left his pitch out well short, but another good birdie putt took him two clear amid Marino's travails at the 17th.
A good up and down saved par at the same hole but he left himself a huge two putts at 18 after his tee shot found an awful lie. His 87 foot attempt finished within four feet, though, and he calmly finished the job to record his second US PGA Tour win, adding to the 2009 Justin Timberlake Shriners Hospitals for Children Open.
Australian Marc Leishman finished six under alongside England's Justin Rose, who produced a stunning back nine by birdieing the tenth before holing a wonderful 25 foot eagle putt at the 12th. David Toms shared third with them.
Elsewhere, Sergio Garcia signed for an up-and-down 70, highlighted by an eagle at the 16th, to finish four under.
