Former Oakland Raiders wide receiver Thomas Mayo is working out for the Miami Dolphins today, according to a league source. Mayo was signed by the Raiders in 2012. He went undrafted out of California (Pa.). Mayo was an All-American in college. Mayo has also played for the New York Jets and with the Chicago Rush and Spokane Shock in the Arena Football League and in the Indoor Football League with the Tri-Cities Fever. He participated in the NFL veteran combine in Arizona this year. Follow me on Twitter: @RavensInsider Aaron Wilson covers the Ravens for The Baltimore Sun