AP source: Raiders agree to deal with QB Marcus Mariota

In this Jan. 19, 2020, file photo, Tennessee Titans' quarterback Marcus Mariota warms up before the NFL AFC Championship football game against the Kansas City Chiefs in Kansas City, Mo. The Las Vegas Raiders have agreed on a contract with free agent Mariota to provide an experienced backup behind starter Derek Carr. A person familiar with the deal said Monday, March 16, 2020, the Raiders reached the deal with the former No. 2 overall pick in the 2015 draft. (AP Photo/Charlie Riedel, File)

ALAMEDA, Calif. — The Las Vegas Raiders have agreed on a contract with free agent quarterback Marcus Mariota to provide an experienced backup behind starter Derek Carr.