When was the Polish professional boxer over which Joe Smith Jr. rose to prominence in 2016 by scoring an upset knockout victory born? 
Joe Smith Jr.:  He rose to prominence in 2016 by scoring an upset knockout victory over Andrzej Fonfara, and later becoming the first boxer to score a stoppage victory over former world champion Bernard Hopkins, who retired after their fight. Andrzej Fonfara: Andrzej Fonfara (born 4 November 1987) is a Polish professional boxer who held the IBO light heavyweight title from 2012 to 2013.
4 November 1987