
Oxford United have signed forward Sean Rigg from League Two rivals Port Vale ahead of the new season.
Oxford goalkeeper Wayne Brown has signed a new two-year contract with the club.
Shrewsbury have made their first signing of the summer with the capture of midfielder Asa Hall from Oxford United.
Asa Hall is set to leave Oxford United after failing to agree a new contract with the League Two club.
Oxford United boss Chris Wilder says he will seek the advice of fitness experts from Super League side Wigan Warriors this summer.