Part of that is Pinson is right around average for D-1, and Harris is really bad.
https://www.sports-reference.com/cbb/players/xavier-pinson-1.html
https://www.sports-reference.com/cbb/players/blake-harris-1.html
They both play on similarly rated teams, defensively, so it's not like Pinson's efforts are being masked by the rest of the team.