New York Yankees pitcher Mariano Rivera (42) during game against the Oakland Athletics at Yankee Stadium in Bronx, New York; May 4, 2013. Yankees defeated Athletics 4-2. (AP Photo/Tomasso DeRosa Stock Photo - Alamy

New York Yankees pitcher Mariano Rivera (42) during game against the Toronto BlueJays at Yankee Stadium in Bronx, New York; April 28, 2013. Yankees defeated BlueJays 3-2. (AP Photo/Tomasso DeRosa Stock Photo - Alamy

New York Yankees pitcher Mariano Rivera (42) during game against the Oakland Athletics at Yankee Stadium in Bronx, New York; May 4, 2013. Yankees defeated Athletics 4-2. (AP Photo/Tomasso DeRosa Stock Photo - Alamy

New York Yankees pitcher Mariano Rivera #42 during a game against the Texas Rangers at Yankee Stadium on June 16, 2011 in Bronx, NY. Yankees defeated Rangers 3-2. (Tomasso DeRosa/Four Seam Images

New York Yankees pitcher Mariano Rivera (42) during game against the Oakland Athletics at Yankee Stadium in Bronx, New York; May 4, 2013. Yankees defeated Athletics 4-2. (AP Photo/Tomasso DeRosa Stock Photo - Alamy

New York Yankees pitcher Mariano Rivera (42) during game against the Oakland Athletics at Yankee Stadium in Bronx, New York; May 4, 2013. Yankees defeated Athletics 4-2. (AP Photo/Tomasso DeRosa Stock Photo - Alamy

New York Yankees pitcher Mariano Rivera #42 during a game against the Texas Rangers at Yankee Stadium on June 16, 2011 in Bronx, NY. Yankees defeated Rangers 3-2. (Tomasso DeRosa/Four Seam Images

New York Yankees pitcher Mariano Rivera #42 during a game against the Texas Rangers at Yankee Stadium on June 16, 2011 in Bronx, NY. Yankees defeated Rangers 3-2. (Tomasso DeRosa/Four Seam Images