Conversation so far:
When did The Righteous Brothers break up?
The duo split up in February 1968, a breakup that would last for more than six years.
What was the reason for the split up of the Righteous Brothers?
Medley left to pursue a solo career.
Did Bill Medley release any albums after the Righteous Brothers broke up?
Medley recorded a few solo recordings on several labels.
What was Bobby Hatfield doing after the Righteous Brothers broke up?
Hatfield teamed up with singer Jimmy Walker (from The Knickerbockers) using the Righteous Brothers name on the MGM label.

Question: How long were Hatfield and Walker together?
Self-contained rewrite: How long were Hatfield and Walker together?