Dave,
I've not heard anything about a player going to Plymouth.. It's unlikely to be Boyle as many people think that this is going to be his breakthrough season - according to some people Gary Naysmith wanted to leave when Boyle turned pro because Naysmith felt Boyle was the better player.
Perhaps it will be John Ruddy - he's a goalkeeper and has been out on loan most of the season, another is Northern Ireland u21 player Ryan Harpur.