Jon Gruden was traded to the Tampa Bay Buccaneers in 2002.. So it is possible to trade a coach only he has to be willing to be traded.. did you know Mike Holmgren was traded to the Seahawks?
What kind of draft capitol could the Seahawks get for Carroll?
5 coaches that were traded in the NFL
https://www.oregonlive.com/nfl/2015/12/ ... en_tr.html