The Bombers of course in football.
NFL my team has been the Raiders since I was a kid.(laugh, get it out of your system, lol). Other teams I'd cheer for over the years based on personnel and as long as they weren't playing the Raiders: San Francisco, Dallas, Miami, Pittsburgh and the Vikings due to seeing many of their games.
Hockey is the Jets, though I grew up a Habs fan since we didn't have the Jets then. I'm an Original Six guy and was a big fan of Chicago and Boston(again when not playing The Habs).
Baseball now is the Blue Jays but was originally the Montreal Expos. Twins and Tigers because we saw them alot on the tube and used to be a big Oakland A's rooter in the 70's when they had the monster teams.
Basketball is The Raptors though I honestly pay the least attention to the NBA of the 4 major team sports. Was a fan of the Celtics and the lakers back in the day. Haven't been to a Sea Bears game but I did used to go Thunder and Cyclone games.
EPL and Liverpool is my team. Cmon and fight me now!
Mostly lost track and all interest of all things, tennis, golf, auto racing, bowling(ABC or NBC used to have it on Saturday afternoons I think(Earl Anthony, Pete Weber).
Professional Wrestling fan but today's product and for a long time actually is nothing like the AWA that I grew up with.