I consider people who touch the ball skill position players for the most part. Those players have a higher bust potential but also a higher reward potential.
There are also position critical players such as QB,LT,C, MLB.
The main thing is finding someone good enough to warrant signing to a second contract like you said.
I can track with that.
It was just a question, especially considering how specialized Line play has become. One could almost make a point that their positions are skilled as well, even though they don't touch the ball.