The Rikers are shown to be extremely violent on the pitch and whilst its called out when D'Jok is injured, other incidents are not such as when one of the player deliberately kicks Tia in the rib-cage which given the size difference could have shattered them and caused a life threatening injury, in fact the only time any intervention is used is during Meis tackle.
How did it take so long for the team to find out that Rocket and Aarchs family relation given the latter and rockets father are Brothers and would all share the same last name, in fact it would be Gossip on Akilian and at least four of the team members would be aware of it.