No, a 'troll' is someone whose primary objective when posting is to incite ******** and bait other posters.
In the sports forum context, it is someone who roots for a team other than the one being discussed, often a rival. The troll in question will also post negative, unrealistic crap about the team the site is dedicated to, always try to rain on parades, take the absolute worst case scenario and pass it off as logical and likely, and accuse others (the fans of the team the forum is dedicated to) of unrealistic optimism. Stuff that would be looked at as 'o noez sky is falling' material if it came from one of those fans. You fit that description perfectly, at least at the moment.
EDIT: length of tenure has absolutely nothing to do with it. You can be a troll and not get banned, because all your s*** can be perfectly subtle or you can just counterbalance it with other crap, such draft and Yankee discussion.