Federico Plummer made his professional debut, a sixth-round knockout of Sam Langford on May 23, 1947.
Plummer won his first six fights before losing to Mike Ross in April 1948.
His first 30 bouts took place in his native Panama; he took a record of 26–2–1 (1 no contest) into his first foreign fight, a loss to Redtop Davis on December 10, 1951.
Plummer's final match was a decision win against Kid Centella in Managua on September 8, 1959.
[1] final match was a decision lost to Tony Huerta.