Correct. Chuck Howley was also the only Super Bowl MVP from a losing team.

Good guess on Randy White, goombah. He played a little before your time, but he wore #54, which was a linebacker number. He shared the '78 MVP award with felow defensive lineman, Harvey Martin as you said. Martin is the only Super Bowl MVP, who is deceases, having died from pancreatic cancer 6 or 7 years ago.

A linebacker, who played well enough to win an MVP in the Super Bowl was Rod Martin, who picked off three Theismann passes to help the LA Raiders beat the Redskins in the mid-80s. Marcus Allen, however, set a rushing record in the game that was broken a few years later.