The Lumberjacks were led by second-year head coach Kyle Keller and played their home games at the William R. Johnson Coliseum in Nacogdoches, Texas as members of the Southland Conference.

They defeated Central Arkansas, Nicholls State, and Southeastern Louisiana to become champions of the Southland tournament.

They received the Southland's automatic bid to the NCAA tournament where they lost in the first round to Texas Tech.

On May 20, 2020, following the discovery of an administrative error in certifying eligibility for student-athletes, Stephen F. Austin reached an agreement with the NCAA to vacate hundreds of wins across multiple sports from 2013 to 2019, including all 117 men's basketball wins from the 2014–15 to 2018–19 seasons.

They defeated Lamar in the quarterfinals of the Southland tournament to advance to the semifinals where they lost to Texas A&M–Corpus Christi.