He may be extraordinarily busy trying to navigate issues like immigration reform and North Korea, but president Barack Obama does make cameos in the sporting world from time to time. He hosted the reigning NBA champion Miami Heat at the White House Monday, enabling one of the best LeBron-Wade photo ops ever. He also said something fairly more serious than "congratulations" when, in an interview with the New Republic, he expressed concern for the health of college football players who never go onto the NFL, and mused on reducing the sport's built-in violence to soothe the viewing public's conscience. "I'm...