Frank Klaus

Francis Klaus (December 30, 1887 – February 8, 1948) was an American boxer from 1904 to 1918. Known as the Braddock Bearcat, Klaus claimed the vacant World Middleweight Championship in 1913 and was elected to the Ring Boxing Hall of Fame in 1974.

Gifted with a strong punch, he lost exceptionally few fights in his nine-year career, and was knocked out only once. Nat Fleischer ranked Klaus sixth as the All-Time Middleweight. His manager was George Engel.