Hard to really answer that. How do you match them demographically, by their backgrounds, or by their current status of making roughly $250k/year to millions/year?
There are around 2,000 currently "in the league" during the season, and another seven-hundred or so in the off-season. Throw in a few hundred part-timers and hangers on. So roughly 3,000 were part of the league at one time or another in 2014. It appears there were 48 arrests in 2014. So 1.6%?
Are 2% of the highest wage-earners in the US arrested annually? Interesting question.