MLB - Last night's perfect game was the 4th in franchise history for the Yankees - the most in AL/NL history.
Yankees' Domingo German throws perfect game vs. A's
Oral history of David Cone's perfect game
Yankees pitcher throws a perfect game, just the 24th in MLB history : NPR
Did Catfish Hunter have the most perfect game ever? - Athletics Nation
Weeks after throwing perfect game, Yankee pitcher Domingo Germán enters treatment for alcohol abuse
YES' Ryan Ruocco on calling Yankee Domingo German's perfect game
Domingo Germán perfect game: Seven notable facts, including good omen for Yankees and the righty's inspiration
YES' Ryan Ruocco on calling Yankee Domingo German's perfect game
Oral history of David Cone's perfect game