Ok....When someone leaves they bring in another player to replace them. The number of active and inactive players in any given year is higher than 125. Not too mention he has actually coached a lot longer than 21 years and if we are looking for a history of racist behavior, I think they would look at his entire career. Include transfers, etc. it goes up.
I agree so he is probably around 900 - 1000 players coached at Iowa. I am considering 1 player for 3 years is still only 1 player and figure an average of 3 years due to some leaving early and some red shirts.