 
<translate> Iji zaa ajụjụ a, anyị kwesịrị ịma nke a: Bill Russell bụ onye na-agba bọọlụ na Boston Celtics bụ onye kacha nwee mmeri n'asọmpi NBA, ọ bụ ya meriri ugboro iri na otu n'ime afọ iri na atọ ọ gbara bọọlụ. Ya mere, azịza ya bụ Boston Celtics center Bill Russell. <eng> To answer this question, we should know that: Boston Celtics center Bill Russell holds the record for the most NBA championships won with 11 titles during his 13-year playing career.
Therefore, the answer is Boston Celtics center Bill Russell. 