Pretty high representation: 

1.  Sam Hubbard:  Bengals

2.  Denzel Ward:  Browns 

3.  Cam Heyward: Steelers

4.  Jerome Baker:  Dolphins

5.  Corey Linsley:  Chargers

I doubt there's been many other colleges with so many nominees in a year.

https://www.nfl.com/news/2021-walter-payton-nfl-man-of-the-year-nominees-unveiled