Possible Clues:

• TV's Trebek
• Baseball's Rodriguez
• Author Haley
• 'Roots' author Haley
• "Roots" author Haley
• 'Jeopardy!' host Trebek
• Emcee Trebek
• "Jeopardy!" host Trebek
• Trebek of 'Jeopardy!'
• Quizmaster Trebek