Doonesbury by Garry Trudeau for September 29, 1972
Transcript:
Joanie: Mike! Mike! Will you come here, please, dear? Zonker left for the game without his helmet! Don't you think we should get it to him? Mike: Don't worry, Ms. Caucus, that's just his practice helmet. He's got a special helmet for games! Zonker: Play ball cap'n!!