Simplify the following text for a Grade 10 native English-speaking person.
Original: Randolph Adolphus ( ` Randy ' ) Turpin ( 7 June 1928 â `` 17 May 1966 ) known as the Leamington Larruper , was an English boxer who was considered by some to be Europe 's best middleweight boxer of the 1940s and 1950s .
Simplified: Randolph Adolphus ( ` Randy ' ) Turpin ( June 7,1928 â `` May 17 , 1966 ) was an English boxer who was the middleweight champion of the world in 1951 .