A birdie at the last earned Ryan Moore a third-round 67 and a one-shot lead at the Valspar Championship in Florida . The American carded four birdies in a flawless round to hold a narrow advantage over Jordan Spieth . He went through the first 12 holes in level par before picking up shots at the 13th , 14th , 16th and 18th to move on to nine under par for the tournament . Ryan Moore played well on the third day to move into a one-shot lead going into the final round . Moore carded four birdies in the final six holes to move ahead of Jordan Spieth at the head of the field . Spieth went round in a three-under 68 , with four birdies and a bogey , with a third American , Derek Ernst , on seven under following a 69 . Sean O'Hair was three shots off the pace in fourth place after shooting 69 ahead of a group of three on five under , Patrick Reed , Matt Kuchar and Henrik Stenson . Scotland 's Russell Knox was the highest-placed Briton , in a tie for 10th on three under after a 70 . England 's Ian Poulter crashed completely out of contention , carding a four-over 75 to slip back to level par . Spieth is one shot back after a three-under-par round of 68 and will be confident going into the final day . Ian Poulter plays out of a bunker during a round of four over par that saw him fall off the pace .
Ryan Moore cards a round of 67 to lead by one shot from Sean O'Hair . Jordan Spieth , Matt Kuchar and Henrik Stenson still within reach . Ian Poulter shoots shocking 75 to fall away before final round .