In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
Q: He reigned as the world heavyweight champion from 1937 to 1949 , and is considered to be one of the greatest heavyweight boxers of all time .
A: 
He was the world heavyweight champion from 1937 to 1949 .