12 rounds

Tommy
Sullivan
VS
Frank
Klaus

Klaus · KO 2/12

Oct 12, 1911 · Arena (Armory A.A.), Boston, 🇺🇸

Sullivan going in—

Klaus going in55-12-11

Confirmation✓ one source

MethodKO

Round2 of 12

Sources

English Wikipedia
side b · observed 2026-10-11
en.wikipedia.org/wiki/Frank_Klaus

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