Bury goalkeeper Rob Lainton has signed a new 12-month contract with the League Two club.
Grimsby sign Cambridge United's Nathan Arnold while Scott Brown, Craig Clay and Shaun Pearson sign new contracts.
Chesterfield have turned down an offer from Portsmouth for midfielder Gary Roberts.
Bury goalkeeper Rob Lainton has signed a new 12-month contract with the club.
Chesterfield turn down a bid from League Two Portsmouth for winger Gary Roberts.
Luton have signed defender Dan Potts from Premier League West Ham on a two-year contract.
Cheltenham have made their fourth summer signing with the arrival of former Oldham forward Amari Morgan-Smith.
Luton Town sign defender Dan Potts on a two-year deal following his release by Premier League side West Ham.