1) If you don't like the Kearsley example, then maybe you'll relate more to Jake Heaps. Heaps had a very good freshman year and even made honorable mention freshman all-American. That was the best season of his career. He was highly recruited, played well as a freshman, does that mean he belongs on Bronco's success list?
2) Players get judged on their track record all the time in almost every arena. Koroma had a nice season and maybe he'll build on that success and be good next season too. Maybe he won't time will tell. For right now, he doesn't belong with the other players listed particularly the other center Aulai. Aulai has a longer and better track record than Koroma. Koroma may pass him, but he hasn't yet.