Contracts likely state the coach is free to interview for a HC job at anytime. Permission to interview is mandated. If a coach is deemed good enough to be considered for an NFL head coaching job it can be assumed he’s good enough to do his coaching/ coordinating job at the same time. If that weren’t the case he wouldn’t be getting the interview in the first place. With Harbaugh, Vrabel, etc. out there available to interview now, why would Quinn’s agent agree to a deal where he would have to wait to be involved in the interview process?