The 1989–90 East Tennessee State Buccaneers basketball team represented East Tennessee State University during the 1989-90 NCAA Division I men's basketball season. The team was led by head coach Les Robinson. The Bucs finished the season 27–7 and 12–2 in Southern Conference play to finish in first place after the regular season. They won the Southern Conference tournament championship in Asheville to receive the automatic berth to the NCAA tournament as the No. 13 seed in the Southeast region. They lost to No. 4 seed, and eventual Final Four participant, Georgia Tech, 99–83 in the first round.
Roster
Source
Schedule and results
!colspan=9 style=| Regular season
!colspan=9| SoCon tournament
!colspan=9| NCAA tournament
Source
Awards and honors Keith Jennings – SoCon Player of the Year (Coaches)
References