When Brown retired as head coach following the 1975 season and appointed Bill "Tiger" Johnson as his successor, Walsh resigned and served as an assistant coach for Tommy Prothro with the San Diego Chargers in 1976. In a 2006 interview, Walsh claimed that during his tenure with the Bengals, Brown "worked against my candidacy" to be a head coach anywhere in the league. "All the way through I had opportunities, and I never knew about them," Walsh said. "And then when I left him, he called whoever he thought was necessary to keep me out of the NFL."