For a very long time, one of the worst things you could be as an NFL prospect is a “tweener”. That is (or was) a player who didn’t fit neatly into the readily established boxes of the common Pro Style systems.
The league didn’t really know what to do with players who were the wrong size or had too-expansive skillsets for their projected positions in the NFL.
Colorado State edge defender Mohamed Kamara would likely have gotten the “tweener” label a few years ago. He was a defensive lineman in college, rushing from a three or two point stance, and has had 42.