The NFL employees these players and most employers shoud do a better job of caring for their employees mental health. They are not responsible for his actions, but they have the resouces they need to provide their players with better mental health and behavioral care, assuming he exhibited symptoms prior to the arrest.
The NFL owes players and ex-players better counseling. It is by now well known that the chronic concussions NFL players suffer causes a condition known as CTE. People with CTE suffer all types of neurological and emotional problems. Therefore, the NFL has a duty to help its players deal with this condition.
No, NFL players already receive an amount of assistance and counseling that regular citizens can only dream of. NFL also pays these players obscene amounts of money, meaning the players and their families should have sufficient resources to acquire whatever additional support they need themselves. After all, a regular family with less resources are expected to handle these matters; why would the already privileged get even more for free just because?
Todd Marinovich's addictions resulted in a very talented player having an extremely short and unimpressive NFL career. His mental problems had begun prior to his time in the pros, but were not obvious to others. He has not been a football player for decades and has only a lose association with the NFL.