Undefeated heavyweight contender Anthony Joshua has 15 ere knockouts bere 15 profesionala borrokak. Check out this video compilation from SHOWTIME Sports showcasing all of Joshua’s KOs. And tune in Larunbat honetan to watch the 2012 British Olympic Gold Medalist challenge undefeated American titlist Charles Martin for the IBF Heavyweight World Championship, SHOWTIME bizi at 5 p.m. ETA/2 p.m. PT from The O2 in London.