Kevin O'Brien
fastest 100 century in 50 Balls 
Ever  in World Cup | England vs Ireland ODI 2011

13  fours and 6 sixers 
Ireland's Kevin O'Brien World Record
63 Balls 113 Runs (Run Out)  
Ireland's Kevin O'Brien smashed the fastest Cricket World Cup century in 50 balls against England in Group B on Wednesday.

The previous best was Australian Matthew Hayden who took 66 balls to achieve three figures in 2007 against South Africa. O'Brien hit six sixes and 13 fours in his amazing innings as Ireland responded to England's 327-8.