Nope. But explains Zeke, Marona, Knapp...but yet we take someone like Arciniega who has already suffered from 3 concussions throughout his career. Strange?
Yes, this was put out there in one of the PS articles about Zeke after he was medically disqualified.
Actually this has been going on at least back to Adam Harris.
http://blog.syracuse.com/orangefootball/2011/12/concussions_ko_football_career.html
Making the call on concussions There are no rules concerning how many concussions should sideline an athlete in a particular sport, said Tim Neal, assistant athletic director for sports medicine at Syracuse University. Three is a number sometimes used as a decision point regarding whether an athlete should continue in a contact sport, but there are many other factors to consider, Neal said.
“When people start talking about the numbers of concussions before you consider retiring from a collision sport, certainly three is a number that has been out there for some time,” Neal said. But other factors must be weighed, Neal said:
» How old the athlete was when the first concussion occurred;
» How the concussion happened: Was it the result of a spectacular hit or did it stem from a routine play;
» How long the symptoms lasted. Concussions are graded as mild, moderate or severe.
Neal said the severity and frequency of past concussions are critical factors in gauging the likelihood of another concussion occurring. So is an athlete’s sport and position. Adam Harris, for example, was a running back who did a lot of blocking.