UFC has grown at a enormous rate around the world but the event that is coming to Dublin in July 2014 exemplifies the growth of the sport world wide. The much anticipated event sold out minutes after tickets went on sale and are now retailing at 3 times the original price with tickets available from €240 on various bidding sites.
I haven't followed the sport as closely as I would have liked over the years but I do know that this guy has made it more popular than ever in Ireland.
http://en.wikipedia.org/wiki/Conor_McGregor