Western Illinois (19-7) led 29-27 at the half and had an advantage into the second, but Forbes put Cleveland State (14-16) ahead with a 3-pointer with 15:25 left in the game. Forbes and Lee each had two 3-pointers for the game.
Western Illinois hung around, and was within 44-42 on a layup by Ceola Clark with 8:39 left, but could not regain the lead.
Maryland point guard Melo Trimble, considered a lock to leave the program before struggling in the second half last season, has withdrawn from the NBA draft and will return for his junior season.
Louisville's Chinanu Onuaku, who recently underwent a medical procedure to correct a heart rhythm issue detected during the combine, will keep his name in the NBA draft pool.
Andrew White III will return to the Nebraska men's basketball team next season after removing his name from the NBA draft.