Lazaro Antonio Díaz Sr. is an American umpire in Major League Baseball wearing number 63, a reference to his year of birth. He joined the American League's full-time staff in 1999, and has worked throughout both major leagues since 2000. Díaz was promoted to crew chief for the 2022 season, becoming the second full time Latino crew chief, after Alfonso Marquez.
Díaz in 2011
Mark Buehrle's perfect game
On July 23, 2009, Mark Buehrle of the Chicago White Sox pitched a perfect game against the Tampa Bay Rays. The game took place at US Cellular Field in Chicago in front of 28,036 fans, and occurred from 1:07 PM CT to 3:10 PM CT.
Chicago White Sox teammates celebrating following the final out of Mark Buehrle's perfect game.
Buehrle receiving a sign during the perfect game