When the game first began, there were MANY players who were over 1000 at the DI level, particularly on high prestige teams run by Sim AI (because back then no one else had the qualifications to be there yet).
WIS has reduced the levels of player ratings over the seasons to where they are now. it used to be the talent at DII was above DI now, and a DIII team back then could probably be on par with many DI teams now.
Yeah it's rare now, but obviously it does happen.