Not the whole time. If you hover over the 99 in the upper right hand corner, you'll see it: https://www.hockey-reference.com/players/d/dudleri01.html
Also, Sean McIndoe had an article about it in the Athletic yesterday, if you have a subscription. (Actually, he had an article about it even if you don't have a subscription.)
Edit: Also here; https://www.hockey-reference.com/teams/WIN/1981.html