In the 2009–10 season, Wolf returned to the first team from injury in the pre–season and retained his captaincy ahead of the new season. He was featured in the first team for the side at the start until he was suspended for two matches after being involved in an incident in a friendly match. His return from suspension against Bochum on 25 September 2009 was short–lived when he suffered an injury during the match. After spending weeks on the sidelines, Wolf returned to the first team on 17 October 2009, in a 3–0 win over Hertha BC. As the 2009–10 season progressed, Wolf remained in the first team for the rest of the season despite being absent twice and finished the season making 32 appearances in all competitions.