MLB has honored Robinson many times since his death. In 1987, both the National and American League Rookie of the Year Awards were renamed the "Jackie Robinson Award" in honor of the first to receive the award (Robinson's Major League Rookie of the Year Award in 1947 encompassed both leagues). On April 15, 1997, Robinson's jersey number, 42, was retired by Major League Baseball. No future player on any major league team can wear it. The number was retired in ceremonies at Shea Stadium to mark the 50th anniversary of Robinson's first game with the Dodgers. A few players who wore number 42 as a salute to Robinson, such as the Mets' Butch Huskey and Boston's Mo Vaughn, were allowed to continue to use the number by means of a grandfather clause. The Yankees' Mariano Rivera is the last player in the major leagues to wear jersey number 42 on a regular basis.