Full back Richard Jackson, who was released by Hereford United at the end of last season, has been training with Burton Albion but hasn't been offered a deal so far.
"Richard is a quality defender who I have known since my days at Derby," said Brewers manager Paul Peschisolido as reported by the Burton Mail.
"He came to train with us because he had a few injury problems, but he has worked really hard and is now near to full fitness.
"I told him a while back that we would continue to monitor his progress and, really, the situation has not changed.
"He'll continue to train with us and hopefully he'll have another game in our reserves next week, but I've discussed things with him and told him I can't promise a contract.
"Richard is a really good player, but there are lot of really good players in his situation who are still looking for a club and still trying to get a contract."