Louis was 6'2 and well built, imagine how big the guy on the left is... He must be nearly 7 foot tall.
He often used Cecil Seal Harris to prepare for taller opponents. One of the men pictured might be Long Tom Hawkins.
Seal Harris This content is protected 1935 Jan 4 Primo Carnera Montevideo, Uruguay EX 4 Jan 13 Primo Carnera Sao Paulo, Brazil LK 7 -Harris was hired by Jack Blackburn as a sparring partner for Joe Louis LongTom 6'5" This content is protected The stocky ,shorter guy might be George Nicholson. This content is protected
So I'm pretty sure these three are: Ace Clark - 268lb "Lightweight" Leonard Dixon - 216lb Seal Harris - 245lb