"over 2,000 NCAA Division I men's basketball players have entered their names into the portal, which equates to about 35% of all players."
Not sure what the football stats are, but it is only going to get worse, this unrestricted free agency of professional athletes playing for "university" football teams.
Link: https://athlonsports.com/college/baylor-bears/ncaa-tournament-team-loses-every-player-on-roster