Andrew Landry and Zach Johnson will head into the final round of the 2018 Valero Texas Open tied for the lead, sitting 13 strokes under par after Round 3 Saturday.
The two Americans sit one stroke ahead of Trey Mullinax, who set a course record with a score of 62 to finish the day at 12 strokes under par.
Ryan Moore, Jimmy Walker and Martin Laird are among those who will try to climb up the standings in the final day of action at the AT&T Oaks Course at TPC San Antonio.
Round 3 Leaderboard
T1. Zach Johnson (-13)
T1. Andrew Landry (-13)
3. Trey Mullinax (-12)
4. Ryan Moore (-11)
T5. Sean O'Hair (-9)
T5. Jimmy Walker (-9)
T5. Chris Kirk (-9)
T5. Martin Laird (-9)
9. Richy Werenski (-8)
Full standings available at PGATour.com.
Johnson and Moore entered the day with a share of the lead at nine under, but there was quickly a lot of competition at the top of the leaderboard.
Mullinax especially took advantage of moving day, posting a course-record 62 with his eagle on 18, as the PGA Tour's official Twitter account showed:
This chip-in for birdie showed off his versatility:
He finished with seven birdies and two eagles, posting an incredible 29 on the back nine. Mullinax shot 74 in Round 1 and was only in 25th place to start the third round but is now in position to potentially win his first career PGA Tour event.
Sean O'Hair was another big mover in Round 3 with his 65, including going four under in the final three holes.
Meanwhile, Landry was nearly flawless with a bogey-free round that began with three birdies in his first six holes:
With two more birdies on No. 16 and 17, he finished with a 67, making him the only player in the field in the 60s for three straight rounds.
However, Johnson was able to catch up with four birdies on the back nine to get to 13-under for the tournament. While he had a slow start with two early bogies, he once again holds a share of the lead as he tries to win this tournament for the third time in his career.
Moore also had a strong back nine to remain in contention in fourth place.
With only four players within three strokes of the lead, Round 4 could be extremely competitive.