Mayfield, who turns 28 next month, split last season with the Carolina Panthers and Los Angeles Rams after playing his first four seasons with the Cleveland Browns.
He was 1-5 with the Panthers and 1-3 with the Rams, completing a combined 60.0 percent of his passes for 2,163 yards with 10 touchdowns and eight interceptions in 12 games (10 starts) in 2022.
Drafted No. 1 overall in 2018, the former Heisman Trophy winner is 31-38 as an NFL starter. Among quarterbacks in his draft class, his 16,288 passing yards and 102 touchdowns trail only Buffalo's Josh Allen (18,397 and 138).