He did discover the connection between concussions (closed headed injuries) in football and dementia and that they are long lasting injuries.
This piece is nothing more than someone airing their grievance with a personality.
You should do a little more reading on sports team owners and their constant attack (verbally and monetarily) on the science of head injuries.
ESPN back in the early 2000's and late 1990's on concussions, Mike Webster and the medical science of closed headed injuries.
The University of Oklahoma did studies on concussions and sub-concussions in football athletes which basically supported Omalu's conclusions on
the head issues with contact sports.
Much of what is in this article is factual but slanted to make Omalu's findings. BC/BU has been funded by the NFL since the early 2000's. Those who
are supported financially by sports corps often skew their information to please their benefactors. The oil company supporting scientists working on Climate Change
is another perfect example.