On this day in 2012, Philip Humber threw the 21st Perfect Game in MLB history, joining Mark Buehrle (2009) and Charles Robertson (1932) as the third White Sox pitcher to do it. : r/whitesox
2009/07/23 Buehrle's 27 outs
OTD in 2007: Mark Buehrle threw the - Chicago White Sox
This Date in Baseball
Chicago White Sox: Mark Buehrle needs more Hall of Fame support
July 23, 2009: White Sox pitcher Mark Buehrle throws perfect game – Hartford Courant
Chicago White Sox to retire LHP Mark Buehrle's No. 56 jersey
Mark Buehrle's 99-minute game revisited: 'Holy shit, look what time it is!' - The Athletic
White Sox South Side Sox Podcast 20 — Looking Back at the Cooperstown Vote, Ahead to the White Sox Hall - South Side Sox
Chicago White Sox - Mark Buehrle Chicago white sox, White sock, White sox baseball
Mark Buehrle leads off major-league display in St. Charles
A perfect game, thanks to a circus catch