10 rounds

Montana
Jack Sullivan
VS
Frank
Klaus

Klaus · TKO 3/10

Mar 28, 1911 · Fairmont A.C., Bronx, 🇺🇸

Sullivan going in—

Klaus going in49-12-11

Confirmation✓ one source

MethodTKO

Round3 of 10

Sources

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

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