Top 10 CONCUSSIVE KOs!!! Marquez, Berto, Lacy... NASTIEST KNOCKOUTS from the Gary Shaw archive

We delve into the wondrous Gary Shaw archive and select 10 of the finest and most devastating knockouts. Subscribe for updates - http://goo.gl/meA2GB Enter The KO Cup - http://bit.ly/enterthekocup More boxing news 24/7: http://goo.gl/aJFtws Follow on Twitter: http://goo.gl/VDYVMP Like on Facebook: http://goo.gl/mI5B64 SecondsOut is a world leader in boxing entertainment since 1999. Part of the Knockout TV YouTube MCN - http://goo.gl/t77GMc