Conversation so far:
When was the first Demo released by The Replacement's?
Westerberg originally handed in the tape to see if the band could perform at Jay's Longhorn Bar
What was a song on the demo given to Jay's Longhorn Bar?
Westerberg eavesdropped as Jesperson put in the tape, only to run away as soon as the first song, Raised in the City, played.
Was the demo from The Replacement's popular?
Jesperson played the song again and again. If I've ever had a magic moment in my life, it was popping that tape in, said Jesperson.

Question: Who was Jesperson?
Self-contained rewrite: Who was Jesperson?