Right now Oscar would be a rebounding specialist and that's about it. He lacks the size and athleticism the NBA covets. Harrell doesn't have great size but is a freak athlete. Oscar's kryptonite is longer/bigger players he can't just muscle out of the way, and he'd be facing those guys every day in the NBA. Also doesn't really have a face-up game at this point mainly due to limitations with ball-handling (again lack of elite athleticism plays into this). The attributes that make him dominant are strength, great understanding of positioning, timing, quick 2nd jump, and a non-stop motor.