The aide who helped Mayor Rob Ford run his football teams has quit his job, becoming the sixth Ford staffer to resign in just over a month.

Christopher Fickel is no longer an administration employee, a city spokesperson said Wednesday. The mayor’s office, which does not communicate with the Star, did not respond to a request for comment.

“It was my pleasure to work with Chris Fickel, a hardworking, dedicated colleague of outstanding character who will be an asset wherever he goes,” Ford’s former chief of staff, Mark Towhey, wrote on Twitter.

Including Towhey, whom he fired, Ford has lost seven aides since he became embroiled in a crack cocaine scandal in mid-May. (He denies that he uses crack.) He has hired at least eight others. More than half of his 17-person staff has worked for him for less than a year.

Fickel, who had served as both a special assistant and assistant to the chief of staff, helped Ford with constituency work. He was best known, though, for his controversial role on the coaching staff of the Don Bosco Eagles football team.

Fickel was such a regular presence on the Eagles sidelines that he was listed as an assistant coach on the team’s game rosters and posed with the players in team photos. He often used a government car for football events, a possible violation of city policy.

In September, in the midst of a controversy over Ford’s use of city resources for football, Fickel attended a mid-afternoon practice in the car when Ford was on a U.S. trade mission.

Fickel sent unsolicited emails to Catholic schools in March to offer them up to $10,000 from Ford’s foundation to start football teams. The emails, another possible policy violation, puzzled school administrators.

Fickel also had a controversial role with Ford’s summer football team, the Rexdale Raiders. Along with another then-staffer, he was listed on the Raiders’ Facebook page in 2012 as a contact person for interested players.

Ford was banned in May from coaching football at Don Bosco or any other Catholic school. Earlier in the month, his office hired another person who was listed as a Don Bosco assistant coach, former star player JC Hasko.