Kicker injuries.

Why does my kicker get hurt so often? He has 80 stam.
What's his toughness? The players toughness stat is the main cause for injury
60
Based on this thread along with your thread about your kicker missing kicks it would seem that the problem is high rhythm and/or low energy.

High rhythm causes innaccuracies in key stats and causes injuries in players. So as much as high rhythm helps create gaps it has its shortcomings as well