By Rory Carroll (Reuters) – Tom Brady, widely considered the greatest quarterback in NFL history, is set to retire after 22 seasons and a record seven Super Bowl victories, ESPN reported on Saturday, although other outlets said he had yet to make up his mind. The 44-year-old spent 20 seasons with the New England Patriots, winning six Super Bowls, before relocating to Tampa Bay and leading the Buccaneers to a Super Bowl championship last season. The ESPN report came as something of a surprise after Brady led the league in touchdown passes and passing yards this season and could still potentiall…