re: Easiest sports to make professionals on physical attributes alone?

You could probably make a case for any sport. If you have great hand/eye coordination and a nice swing, you can be a fat guy and still rake.

I'd go with basketball though. Mostly bc the route to the pros is quickest over baseball/football and scouting basketball talent is easier in basketball. Nothing gives an NBA scout wood faster than a tall guy with athleticism and length...