If you have already imported your ESPN league(s), simply syncing their rosters should now resolve any issues you see. You can do this from many pages around our website and our apps, but the blue ROSTER SYNC buttons on this page are the easiest to find: https://league.footballguys.com/#fbglineup/primer.
If you still need to import your ESPN league or are having difficulties, go to https://www.footballguys.com/leagues, click ADD NEW LEAGUES, and follow the instructions there.