Mike Williamson joins the U's
Mike Williamson 33, 6ft 4 centre back has joined up with Oxford United in time to fly out to Portugal.
The free agent who was with Wolves last season has also played for Newcastle, Portsmouth, Watford, Wycombe, Doncaster, Torquay and Southampton.
Since 2009 he has been playing his football in the Championship and Premiership. He has played in nearly 400 first team matches.