Doncaster have signed Manchester City defender Matthew Mills.
He told the club's official website: "It's been quite a long process. After the (play-off) final was over, there wasn't really a decision to make on my part.
"I always wanted to come here and it was just the case of Manchester City allowing me to.
"With all the experience I had last year and the memories of the highs, there has always been a good feeling to come back and now I have, I'm delighted."