I may be wrong but I remember hearing Gregg Williams made the call for 10 men on the field without consulting Gibbs.
http://www.washingtonpost.com/wp-dyn/content/article/2007/12/02/AR2007120201802.html
As much as I think the Cowboys overpaid for Amari Cooper, given the lack of wr talent in this draft, maybe that deal wasn't so ridiculous. What are the chances the Bills draft a wr better than Cooper?