Getting knocked in a professional boxing match must be bad enough. But how about those fighters that get knocked out by lightly regarded punchers? Do these types of losses affect the psyche even more than getting knocked out by a known puncher? I looked at some video of one of Ivan Calderon's title defenses back in 2005, against Noel Tunacao. Even though it wasn't a one-punch knockout, it was a stoppage nonetheless. One of only 6 knockout victories in a career of 39 fights.

I'm sure it's gotta be embarrassing to lose by knockout to someone who rarely knocks out anybody. Are there other well-known examples of this? And even more rare.... are there any documented cases of a one-punch knockout by a lightly regarded puncher? I imagine these would be "perfect storm" type of knockouts. A perfect punch thrown at precisely the right time and catching the opponent perfectly.