10 rounds

Frankie
Castillo
VS
Henry
Armstrong

Armstrong · TKO 3/10

Jan 21, 1938 · Legion Arena, Phoenix

Castillo going in—

Armstrong going in80-13-7

Confirmation✓ one source

MethodTKO

Round3 of 10

Sources

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

✓