RJA #3b: Narrowing Research Topic

I feel like I might have to narrow my topic maybe to two professional sports instead of all professional sports. I think I can strengthen my paper by writing about why some sport enhancing drugs are allowed and others aren't and if they should even be permitted in just TWO professional sports. I'm Thinking that I might use Major League Baseball and the National Football, seeing that those two sports have the most problems with steroid use.