League One club Millwall complete the signing of young Irish central defender Paul Rooney.
League One side Bolton Wanderers sign defender Mark Beevers on a free transfer, on a two-year deal.
Wycombe Wanderers re-sign Millwall forward Paris Cowan-Hall for the third time as he joins on loan until 1 January.
Plymouth winger Gregg Wylde is to join League One side Millwall on 1 July when his Argyle contract expires.
Bolton Wanderers are to host Sheffield United on the opening day in League One following their relegation last season.
Gillingham sign ex-Millwall midfilelder Lee Martin and Deji Oshilaja returns on a season-long loan from Cardiff.