Possible Clues:

• Second baseman called 'The Crab'
• Civil rights' Medgar
• Tinker to ___ to Chance
• Medgar of Mississippi
• Brooklyn's Medgar ___ College
• 'Tinker to -- to Chance'
• Medgar --, US civil rights activist (1925-63)
• Civil rights icon Medgar
• Tinker's receiver in baseball
• Wisconsin governor Tony