The Rams signed Walker on Thursday, Adam Schefter of ESPN reports.
Undrafted in 2012, Walker spent the first three seasons of his career with the Saints, before logging a two-year stint in Detroit. Overall, he's totaled 63 tackles (38 solo), 3.5 sacks, one forced fumble, and one fumble recovery across 42 games. As a member of the Rams, Walker will serve as a rotational piece behind starting defensive tackles Aaron Donald and Michael Brockers.