Jack, who had one year left on his previous contract, yesterday committed his future to his hometown team until the summer of 2016.
The 21-year-old, who has also played regularly at right-back, was called up to the Scotland squad for the victory over Croatia earlier this month and his continued commitment is a huge boost to McInnes as the former Rangers and West Brom midfielder bids to turn the Dons’ fortunes around.
Jack told RedTV: “The new manager said he would like to extend my contract and it’s something I was looking to do as well. I was delighted with it. I know I have still got things to learn. The manager has assured me that he will help me achieve what I want to achieve and help my game along. I was delighted to hear that as well. Everyone is really excited about the new season, we have made a few signings and I think it could be a good season.”
McInnes had previously extended top goalscorer Niall McGinn’s contract and felt Jack’s re-signing was another priority to complement the arrivals of former Celtic midfielders Willo Flood and Barry Robson and striker Calvin Zola from Burton.
McInnes said: “It’s something we have been trying to move forward since the last couple of weeks of last season. Ryan is certainly a player that is only going to get better. He can play a number of positions but I do see midfield as the position he will predominately play.”