Ryan Moore made a 5-foot birdie putt on the 18th hole Saturday for a 4-under 67 and a one-stroke lead in the Valspar Championship.
Moore birdied four of the final six holes on Innisbrook Resort's Copperhead course to reach 9 under.
Jordan Spieth has second after 68. Derek Ernst was two strokes back at 7 under after a 69.
Moore had 12 straight pars before making a move with birdies on Nos. 13, 14, 16 and 18.
Second-round leader Brendon de Jonge had a 4-over 75 to drop into a tie for 14th at 2 under.