Now the word from Self is that Selby has a "hot spot" on his foot and he doesn't want to risk a long term injury. To be honest, probably a good move from the perspective of Self, but Selby is probably steaming. If he got big minutes, there is no doubt he'd go pro. This draft is weak and there was already enough hype surrounding the guy to make him a lottery pick.
Before the Husker game he went through pregame warmups, which explains him being in uniform on the bench with the cast.