The Chargers signed Rex to a contract Thursday, Kris Rhim of ESPN.com reports.

EDGE Analysis

Rex joined the Lions as an undrafted free agent out of BYU on May 10, but he was waived by Detroit just six days later. He is a long shot to make the Chargers' 53-man roster, but he could stick around on the team's practice squad following the conclusion of training camp. Rex will have a chance to show what he can bring to the table in Saturday's preseason finale against Dallas.