Pirog is at 160 and as another poster pointed out, he isn't the biggest guy. He is over 30 years old and is still able to make 160. Bute is at 168 but began his career fighting as high as 173. He would have a distinct size advantage against Pirog in my opinion.

I love Quillen but I think Quillen needs to face someone in the lower top 10/right outside the top 10 before jumping right in with one of the big dogs.