8 rounds

Young
Jack Johnson
VS
Jack
Blackburn

Blackburn · PTS 8/8

Dec 20, 1920 · Grand Opera House, Boston, 🇺🇸

Johnson going in—

Blackburn going in114-22-22

Confirmation✓ one source

MethodPTS

Round8 of 8

Sources

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

✓