Al Singer...lightweight champ

[Andyland]

Al win the Lt. Weight title with a first round knockout and lost it 4 months
later via first round knockout. Sammy Mandell and Tony Canzoneri

Know of any other titles won and lost this way?

[Bundana]

John Mugabi also won and lost his world crown in the opening round.

[Scott9945]

John Mugabi also won and lost his world crown in the opening round.

Good catch. I forgot about the freak injury Jacquot suffered in the first round.

[Andyland]

Al Singer

Only happened twice in the history of boxing? Mugabi and Singer?