Seven-foot, Five-star forward Thon maker plans to declare for the 2016 NBA draft However, NBA rules state a player must be 19 years old and one year removed from high school The rule created the one-and-done culture in NCAA basketball where players go to college for one year before entering the NBA Maker is 19 and living in Canada but went to high school in the US for four years Maker believes he is eligible and awaiting official word from the NBA