Dear Fans: April 15th is one of the most important days in the baseball calendar, Jackie Robinson Day. It is the day on which we honor a proud moment not only in baseball history, but in American history. More importantly, it is the day on which we honor the Great American who made that history, Jackie Robinson. My observance of Jackie Robinson Day has been particularly meaningful this year. On Monday and Tuesday night, my wife and I spent four fantastic hours watching the biography of Jackie Robinson by Ken Burns, Sarah Burns and David McMahon. The documentary presents a flattering and nuanced picture of a truly brave individual. Mr. Burns' documentary contains many great lessons for all of us, and I was so moved by the film that I feel compelled to share with you just a couple of observations. First, while Jackie was a true hero, it is hard to watch this film without realizing that Rachel Robinson is an American treasure, a woman of substance and class who was a partner in e...