Newly-promoted Cambridge United have signed experienced central defender Patrick Bauer on a free transfer from fellow League One side AFC Wimbledon.The 33-year-old, who was out of contract with the Dons, has agreed a one-year deal.Bauer made 30 appearances for Wimbledon in all competitions last season after joining them following spells with Preston and Charlton."He brings the experience of the position, leadership qualities, and a real desire to help us develop and improve as a football club in