Complex sentence: Oliver McCall (born April 21,1965) is an American professional boxer best known for winning the WBC heavyweight title in 1994, after scoring an upset knockout victory over Lennox Lewis.
Split into simpler sentences: Oliver McCall (born April 21,1965) is an American professional boxer. He is best known for winning the WBC heavyweight title in 1994, after scoring an upset knockout victory over Lennox Lewis.