Vacant middleweight title · 20 rounds

Sailor
Ed Petroskey
VS
Frank
Klaus

Klaus · PTS 20/20

Feb 22, 1912 · Auditorium Pavilion, San Francisco, 🇺🇸

Petroskey going in—

Klaus going in59-12-12

Confirmation✓ one source

MethodPTS

Round20 of 20

TitleVacant middleweight title

Sources

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

✓