In their last meeting, Ambers achieved an eleventh round technical knockout of "Baby" Arizmendi on February 24, 1939 at New York's Madison Square Garden. In a close bout that the "Brooklyn Daily Eagle" scored five rounds to Arizmendi and four to Ambers, the referee stopped the bout in the eleventh due to a gash on his opponent's right eyelid received in the ninth which made it difficult for him to continue. The cut was opened again in the tenth with left uppercuts and examined by a Doctor at the end of the round, who ordered the referee to end the bout, which was officially called at the opening of the eleventh. It was the only knockout of Arizmendi's career.