The Star-Spangled Banner, played before every baseball game, has become so tied to the sport that an old joke asks, "What are the last two words of the national anthem?" and answers, "Play ball!" Michael Dwyer/AP hide caption

itoggle caption Michael Dwyer/AP

Yasmani Grandal is swarmed by teammates after hitting a walk-off single to beat the Los Angeles Dodgers on Friday. But commentator Frank Deford wonders why "walk-off" has become such a ubiquitous term. Gregory Bull/AP hide caption

itoggle caption Gregory Bull/AP