If you wanted to go back to fatigue, in hopes that would help your rotation otherwise, I'd try setting up your freshman at "fairly fresh" (of course) but also "less aggressive" under Foul Trouble. He's got a poor defensive rating and freshman-level IQ, so he could easily get into foul trouble, which would hold his minutes down, but free up the rest of your players to play only when "fresh" or whatever you choose. Might not work, but players play so much better when they're fresh, that it might help all your other players play to their potential.
And -- I've never tried this -- but I feel like players foul a lot more when they're tired. I wonder if you could practically force your player into foul trouble by selecting "Tired" for when to pull him for fatigue, but "Less Aggressive" for Foul Trouble. (The possible negative result could have him sitting for much of the game, only to come in and play tired in the final minutes of a close game.)