Oldham's preparations for the new season have suffered a further blow after David Beharall was ruled out of action through injury.
The Latics defender could miss up to a month of the new campaign as he needs an operation on his knee.
The 24-year old cost the club £150,000 from Newcastle last year and made 39 appearances for Iain Dowie's side.
Oldham's New Zealand striker Chris Killen is also unavailable through injury as he has a fracture in his foot, according to the club's official website.
The Kiwi hitman spent the summer playing for his country in the Confederations Cup and is facing two weeks out.