Possible Clues:

• Willie Mays catchphrase
• Willie Mays phrase
• Willie Mays, aka "The ___ Kid"
• Willie Mays descriptor
• The ___ Kid (Willie Mays)
• Relay greetings
• Nickname for an athletic "kid"
• Willie Mays's sobriquet
• The __ Kid: Willie Mays's nickname
• Catchphrase for Willie Mays