Frederick Ernest Schaaf (September 27, 1908 – February 14, 1933) was a professional boxer who was a heavyweight contender in the 1930s but died after a bout.

In the 1930s he went 2 wins, 1 loss with Tommy Loughran, easily outpointed two future heavyweight world champions in Max Baer in their first fight in 1930 and James J. Braddock in 1931.

Six months later, on 10 February 1933, Schaaf fought the huge (more than 250 pounds or 110 kilograms) Primo Carnera, and suffered a knockout loss in the 13th round of 15.

An autopsy revealed that Schaaf had meningitis, a swelling of the brain, and he was still recovering from a severe case of influenza when he entered the ring with Carnera.

[1][2] Schaaf has an official record of 55–13–2 with 1 no contest and 4 no decisions, but the no-decision bouts are due to the scoring practices of the era.