Tony McMahon has agreed a move to Blackpool, with Ben Harris heading to Sheffield United, Sky Sports understands.
New Blackpool boss Barry Ferguson is wasting little time in re-shaping his squad and has already brought in David Goodwillie and Andy Halliday.
Now he has moved for McMahon, who will pen an initial loan deal before completing a permanent switch.
McMahon, 27, joined the Blades in 2012 from his hometown club Middlesbrough.
Left-back Harris joined Blackpool from Queen of the South in 2011, but has barely featured since his move south of the border.