Matt Cassel has agreed to a contract with the Detroit Lions to back up starting quarterback Matthew Stafford, a source confirmed to ESPN.
The news was first reported by NFL Network.
The Lions also have quarterback Jake Rudock on their roster. The team waived quarterback Alek Torgersen on Wednesday.
The Tennessee Titans released Cassel on March 9 after the quarterback served as a valuable veteran mentor and backup for quarterback Marcus Mariota over the last two seasons.
In his two seasons with the Titans, Cassel played six games (two starts), completing 55-of-93 pass attempts for 446 yards, 3 touchdowns and 4 interceptions.