Possible Clues:

• 'Hammer' with a bat
• MLB great who said, "Play so good they can't remember what color you were before the season started"
• MLB great who said, 'Play so good they can't remember what color you were before the season started'
• Record holder for the most M.L.B. All-Star selections
• All-time record setter on 4/8/1974
• Braves great
• "Hammerin'" baseballer
• Atlanta Brave who wore the number 55-Across
• *He hit 755