‘Castillo’s firing shouldn’t come as a shock. The Bills’ offensive line struggled in 2018, which was to be expected after losing veteran center Eric Wood and Pro Bowl guard Richie Incognito. Replacing those two proved supremely difficult. The combination of Ryan Groy and Russell Bodine at center could not match Wood’s steadiness, and the tandem of veteran Vlad Ducasse and rookie fifth-round draft pick Wyatt Teller didn’t make anyone forget about Incognito. Additionally, left tackle Dion Dawkins did not progress the way the Bills thought he would have.’