12 rounds

Otto
Sieloff
VS
Mike
Twin Sullivan

Sullivan · TKO 5/12

Mar 24, 1905 · City Hall, Lewiston, 🇺🇸

Sieloff going in—

Sullivan going in12-1-10

Confirmation✓ one source

MethodTKO

Round5 of 12

Sources

English Wikipedia
side b · observed 2026-10-11
en.wikipedia.org/wiki/Mike_"Twin"_Sullivan

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