A) The pitcher (and father of a future second baseman who called PNC Park home) who helped Clemente load the doomed plane on December 31, 1972, but whom Clemente advised to go have fun on New Year's rather than boarding the flight
B) Clemente's mother's last name, which was originally listed on his Hall of Fame plaque as his middle name but has since been corrected to appear after "Clemente", as is the correct format
C) An unrelated right fielder who was the second man of his nationality elected to the Hall of Fame
A, B, and C all have the same last name. What is it?