Hasim Rahman
Hasim Sharif Rahman is an American professional boxer. Rahman is a former two time heavyweight world champion capturing the unified Lineal, WBC, IBO, amp IBF titles in 2001 with a shock defeat of Lennox Lewis by KO in the fifth round, however he subsequently lost them back to Lewis in the rematch, which was Rahmans first title defense and then capturing the WBC Interim title before being promoted to full WBC champion in 2005. He also captured the WBU heavyweight title from future WBO heavyweight world champion Corrie Sanders in 2000. Rahman has the distinction of being the only other man to have beaten Lennox Lewis the other being Oliver McCall in September 1994.
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Source: Wikipedia