He got introduced to the Fender P-Bass, and he wanted to play the P-Bass. Motown said, ‘Nah, you can't play that. You ain't [making] no money playing that.’ So they didn't want to change.

Fender Musical Instruments -- History, Bass guitar -- History, Fender guitar, Bass guitarists Publisher San Francisco : Backbeat Books ; Berkeley, CA : Distributed to the book trade in the U.S. by ...