Blacks are more likely to be searched in the traffic stops they are more likely to receive even though the reasons for the initial stops are the same as their white counterparts. Even though searches of white drivers in traffic stops are more likely to find something illegal. 

Over all, black defendants are 30% more likely of being incarcerated than white defendants for the same crime. https://www.law.upenn.edu/live/news/2170-new-study-by-professor-david-s-abrams-confirms  

The disproportionate amount of blacks in prison is not due to blacks being more criminal than whites. It is due to the entrenched racial bias throughout our criminal justice system. The war on drugs led to a 700 percent increase in our prison population since the late 70s and it was really a war on people of color doing drugs as study after study has shown. 

The mostly black players who are protesting do indeed address the ROOT of the problem, OP. It is those who deny the problem who are the problem.