the last few sports Yahoo! has been keeping your profile, once logged into the Fantasy Sports section click on your name, there you will be able to see what teams/leagues you have been in, and any trophy you may have won. So if you did win it last year you will be able to see.
http://archive.fantasysports.yahoo.com/nfl/2005/251231
There is the league last year, Donuts won it on an impressive 9 game winning streak Daoust was second