thats right just the roller bearing in the stub (no seal!)
looking at what you had coming out of the stub axle it looks like you had water/mud the swivel, have to ask did it smell like ep90?
if it did then that would be the seal in the swivel ball at the axle end,
if it was just mud/water then it would be the swivel sweap seal eitherway the swivel has to be removed from the axle to do either of the seals so just do both.