Last season, the Detroit Lions had one of the best—if not the best—offensive line in the NFL. They got help in free agent guard Kevin Zeitler to help beef up the interior, and guard Graham Glasgow was coming off his best season ever. Center Frank Ragnow was now the top center in the league with the retirement of Jason Kelce, Taylor Decker was holding his own at left tackle, and Penei Sewell continued his argument as the best offensive tackle in the league.
A year later and there are question marks all over the interior.