Horschel, 37, followed 67-69 with 66-63 over the weekend to end at 23-under, two shots ahead of Wesley Bryan, who was looking to go wire-to-wire while playing on a sponsor exemption.
Wallace’s last victory was the Made in Denmark in early September, 2018. Since then, he has overhauled his game with the help of former European Tour winner Robert Rock, among others.