Rochdale manager Steve Parkin has taken a number of players on trial at Spotland.
Former Scunthorpe United defender Nathan Stanton and the former Blackpool pair of centre back Rob Edwards and goalkeeper Lewis Edge have been handed a run-out by the League Two club.
Stanton (pictured) comes to the North West outfit after being released by The Iron back in May, having suffered a serious knee injury during last season.
Edwards and Edge were made surplus to requirements by The Seasiders at the end of last season.
"Nathan is a natural defender who can play right back, but his best position is central defence," Parkin told the Rochdale Observer.
"Rob Edwards is a naturally fit player who sits on the left side of central defence. The thinking behind him is that he can strengthen central defence and provide cover, should we need it for Alan Goodall at left back."
Another centre back to have reportedly played in Rochdale's friendly against Sheffield Wednesday on Monday is Blackburn youngster Luke Jones.
Owls defender Rory McArdle is another transfer target for Parkin, as he played against The Dale on Monday.