That's because there are some terrible teams in the NL. Colorado,Mil,Cincy,Miami, Phily, San Diego, Atlanta. In the Al there are just a couple CWS, Seattle,Detroit, Oakland. Much easier schedule in the grand scheme of things for those NL teams.
It's because they know absolutely nothing about baseball, get a media person that has played the game like a Siddal.
Edit: was talking about Madini not Wilner and Stoeten.