Walker entered the NFL with New Orleans as an undrafted free agent in 2012. In three seasons with the Saints, he compiled 3.5 sacks and 28 tackles. After two years in Detroit, Walker spent 2017 with the Rams, totaling 22 tackles, a sack and four passes defended. The 28-year-old signed with the Bills last offseason but was cut after training camp and remained a free agent.
No street free agent can fill the massive gap left by Rankins, who was enjoying a monster campaign in the middle of a good Saints defense. Walker will provide depth to the New Orleans defensive line rotation in the NFC title tilt.