今天是 4 月 15 日，也就是一年一度的 Jackie Robinson Day，這一天在美國職棒大聯盟（MLB）具有極其重要的歷史與象徵意義。

這個紀念日源自 Jackie Robinson 在 1947 年身穿 42 號球衣，代表 Brooklyn Dodgers 登上大聯盟，正式打破長年存在的種族隔離制度。他的登場不僅改變了棒球運動，也被視為美國民權運動的重要里程碑之一。

到了 1997 年，在羅賓森登場滿 50 週年之際，當時的大聯盟主席 Bud Selig 宣布一項前所未有的決定：全聯盟永久退役 42 號球衣。這意味著未來所有球隊都不得再讓新球員使用這個背號。這也是北美四大職業運動史上首次，將單一背號在整個聯盟範圍內全面退役，象徵對羅賓森歷史貢獻的最高敬意。

不過，當時已經穿著 42 號的球員則適用「祖父條款」，可以繼續使用直到退休。在這些球員之中，最具代表性的就是 Mariano Rivera。他效力於 New York Yankees，憑藉長達近 20 年的職業生涯，一直穿著 42 號直到 2013 年退休，最終成為大聯盟歷史上最後一位身披這個背號出賽的球員。

李維拉本人也多次表示，穿上 42 號不只是榮譽，更是一種責任。他將這個號碼視為對羅賓森精神的延續，並以穩定且卓越的表現來回應這份歷史重量。

此外，自 2009 年起，MLB 在每年 4 月 15 日這一天有一項極具象徵性的傳統：所有球員、教練與裁判都會穿上同樣的 42 號球衣（通常不印名字），代表跨越種族、文化與背景的團結與平等。這一畫面也成為現代棒球最具意義的年度儀式之一。

總體而言，Jackie Robinson Day 不只是紀念一位偉大的球員，更是在提醒人們，體育可以成為推動社會進步的重要力量，而 42 號，早已超越了一個單純的背號，成為象徵歷史、勇氣與改變的標誌。

April 15 marks the annual Jackie Robinson Day, one of the most meaningful commemorations in Major League Baseball (MLB).

This day honors Jackie Robinson, who in 1947 wore number 42 for the Brooklyn Dodgers and became the first African American player in the modern MLB era. His debut broke baseball’s long-standing racial barrier and is widely regarded as a pivotal moment in the broader American civil rights movement.

In 1997, on the 50th anniversary of Robinson’s debut, then-commissioner Bud Selig made a historic decision: number 42 would be permanently retired across the entire league. This meant that no new player on any team could ever wear the number again. It remains the first and only time in North American professional sports that a single number has been universally retired league-wide.

However, players who were already wearing 42 at the time were allowed to continue under a “grandfather clause.” Among them, the most iconic was Mariano Rivera of the New York Yankees. Thanks to his exceptionally long and successful career, Rivera continued wearing 42 until his retirement in 2013, becoming the last active MLB player to do so.

Rivera often described wearing number 42 as both an honor and a responsibility, emphasizing that he carried Robinson’s legacy every time he stepped onto the field.

Since 2009, MLB has added a powerful tradition to this day: every player, coach, and umpire wears number 42 on April 15, typically without nameplates. This unified gesture symbolizes equality, respect, and the enduring impact of Robinson’s legacy.

In essence, Jackie Robinson Day is not just about remembering a legendary athlete—it serves as a reminder of how sports can influence social change, and how one number, 42, has come to represent courage, equality, and progress.