Warrington spent the first four years of his career with the Bills before signing with the Rams prior to the 2014 season. If he returns, he could play a significant role in Rex Ryan's defense.
The Buffalo Bills are hosting free agent defensive lineman Alex Carrington on a visit at One Bills Drive today.
Carrington, of course, spent the first four years of his NFL career playing for the Bills, so aside from a few stadium upgrades, a snazzy new locker room setup, and a new coaching staff, a lot of it should be familiar to him.