 After successfully rehabilitating his knee in the offseason, Rivera announced on March 9, 2013, that he would retire after the 2013 season, his 19th in the major leagues. Throughout his final year, Rivera spent time during visits to each ballpark meeting privately with fans and unsung team employees to hear their stories and thank them for supporting baseball. He explained: "It was important for me to meet the people who make baseball what it is, the people who work in the game every day. They have given me far more than I have given them." Each opposing team returned the favor by honoring Rivera with a gift during his final visit to their city: in Cleveland, the Indians teamed up with the Rock and Roll Hall of Fame to present Rivera with a gold record of his entrance song "Enter Sandman"; the Minnesota Twins commissioned a rocking chair made of broken bats, many broken personally by Rivera's cutter, called the "Chair of Broken Dreams"; the rival Boston Red Sox gave him a painting and several artifacts from Fenway Park. Many teams made donations to the Mariano Rivera Foundation, the pitcher's charitable organization. Corporate sponsors of the Yankees paid tribute as well; Delta Air Lines dedicated a Boeing 757 airplane with Rivera's signature and uniform number 42 on the exterior, while Hard Rock Cafe retired "Enter Sandman" from its song system at all locations except for its Yankee Stadium restaurant.
