At the Chap Classic hosted by Lubbock Christian University at the Rawls Course, Sebastien recovered from an opening 79 with rounds of 70 and 73, leaving him with a 222 and tied for 16^th place. Two weeks earlier, Sebastien was named the first Sooner Athletic Conference Men's Golfer of the Week for 2020 after he tied for first place and helped his team to a dominant first-place finish at the San Antonio Shootout.
 
As a team at the Chap Classic, Wayland – ranked eighth in the NAIA – tied for third place in the nine-team field, shooting rounds of 299-289-285 for a 9-over 873. The Pioneers’ final-round 3-under 285 was the lowest score of the day.