Many players have increased the tally for their opponents through a deflection or a send back to their goalkeepers with a header. In attempt to guard their post, they end up causing havoc to their team. The worst part if the team is already loosing and defenders are found guilty the most.
Watch some players who put the ball into their own goal:
Chelsea defender David Luiz own goal against WestBrom in a PSG jersey
Real Madrid defender Sergio Ramos own goal against Sevilla
Arsenal midfielder Mathieu Flaminiown goal against Swansea