‘Buffalo and Detroit had agreed to a trade Thursday with Detroit willing to pick up the rest of Dockery’s 7-year, $49 million contract and to guarantee the 2009 and 2010 portions of that deal. However, the Bills failed to file the necessary paperwork with the NFL Management Council by the 4 p.m. dealine, according to a league source, and, rather than pay Dockery $4.5 million for this year, the Bills allowed him to become a free agent. The Lions were still willing to pick up the remainder of the deal with the two guaranteed years and Dockery, who spent today in Detroit, was close to accepting their deal. However, tonight he decided to take the Skins’ deal, which will pay im $3.5 million less over the duraton of the deal.’