Former Spain goalkeeper Iker Casillas – the first goalkeeper ever to keep one hundred international clean sheets (UEFA Euro 2012). A goalkeeper (sometimes written as goal-keeper, abbreviated as GK, keeper, keeps, or goalie) is a position in association football.It is the most specialised position in the sport. The goalkeeper's main role is to stop the opposing team from scoring (putting the ...
https://en.wikipedia.org/wiki/Goalkeeper_(association_football)