Conversation so far:
What is MCA to John Hiatt?
John Hiatt was picked up by the MCA label in 1979.
What else happened in 1979 to John Hiatt besides joining MCA?
John Hiatt released his third album, Slug Line.
Which John Hiatt album was the most successful?
Perfectly Good Guitar was John Hiatt's highest charting album in the US (#47), Canada (#34), the UK (#67), the Netherlands (#13), and Sweden (#11).

Question: What happened after he released these albums?
Self-contained rewrite: What happened after John Hiatt released the Slug Line and Perfectly Good Guitar albums?