I'm trying to think of examples of this. Darius Miller, I guess? But Cal didn't recruit him, he still played 26 minutes a game, he's still probably going to get drafted, and it's hard to argue with him being the sixth man when all the guys ahead of him were that good. Kyle Wiltjer didn't play a whole lot in the tournament, but he got some pretty decent minutes in league games last year and will definitely be a factor going forward. Is there someone I'm missing? Not trying to be a jerk, there very well could be, but I can't think of any right now.
Edit: You know what? Come to think of it, Stacey Poole Jr. might preemptively fall into this category, given that he didn't play much as a freshman and transferred before his sophomore year. Like with Gbinije, who knows what would have happened had he stuck it out? But yeah, I guess you can potentially put him in that category of being squeezed out due to too much talent.