So it happens that Opening Day of the baseball season coincides with Good Friday, a day of "fasting and abstinence" according to Catholic tradition. (Then again, after Vatican II, the definition of "fasting and abstinence" weakened significantly. All that most people remember any more is "no meat".)
Catholics in Boston have applied to the archdiocese for a special dispensation so they can have a hot dog at the game. The Church said "Nice try".