Had ND in his final eight schools a couple years ago. Reserve player for UM, but has potential and is athletic.
I don't know that he's a better player than Dickinson, but he's more athletic.
Link: https://www.freep.com/story/sports/college/university-michigan/wolverines/2020/04/09/michigan-basketball-colin-castleton-transfer-portal-impact/5120247002/