Former undisputed world heavyweight champion Lennox Lewis (41-2-1, 32 KOs) named Oliver McCall and Hasim Rahman the most powerful punchers among their rivals.
“I can only assume that it is McCall and Ramkhan since they are the only ones who knocked me down. You don't feel them...until you do," Lewis wrote while chatting with one of his Twitter followers.
In 1994, McCall knocked out Lewis in the second round, and Rahman knocked out Lennox in 2001 in the fifth round.