I didn't know this Brown... but
The other great Jim Brown of our time was Syracuse University football great of the same name.
I saw him play lacrosse against alma mater Hobart College, then one of the premier lacrosse schools in America --- and still pretty well-ranked now as the sport has gained in popularity.
Jim Brown played mid-fielder for Syracuse U.
The Hobart stick-men were bounced hither and yon as the fleet, muscular Brown worked his magic.
Brown later became and actor and was in some trouble.
Like most people.