Edwards played the first half of Boston's friendly against Goole, but did not have his trial extended.
Instead, the 23-year-old former City defender is now on trial at Grimsby Town. He could even play in the Mariners' game at the KC Stadium on Wednesday, when they take on City for Neil Mann's testimonial. It will be his first appearance at the ground, as his last game for City was at Kidderminster back in October before the £43million stadium was built.