We think he may be the man following the trio during the procession.
So, it's the man directly behind Oswald wearing the white hat. I made this collage:
The Wizard made this gif:
He also made this one:
We also think that this may be him as one of the Penguins when the scuffle broke out.
In any case, he certainly didn't have one linebacker shoulder. I consider this an alteration to hide Bookhout. His shoulder is too wide, and that's a fact.