BRADENTON, Fla. — Brooks Koepka hit one his worst tee shots of the day that barely cleared the water on the 15th hole. That turned out to be the start of three straight birdies that led to a 6-under 66 and a one-shot lead Friday in the Workday Championship.

Koepka hit a chip 9-iron to 6 feet for birdie on No. 15, nearly holed his wedge on the next hole and then birdied the par-5 17th with a splendid bunker shot across the ridges and down the slope to tap-in range.

He finished at 11-under 133, had a one-shot lead over Cameron Smith, Billy Horschel and PGA champion Collin Morikawa, who made up ground quick with six birdies over his last 10 holes.