So I have this American friend who thinks that Celtic FC is pronounced as kel-tic.
He keeps saying that its pronounced kel-tic because he heard it at Fenway Park when they were playing Sporting FC and I kept telling him it was pronounced sel-tic.
I know it's a weird question but it is pronounced as sel-tic, right? 

It's not called Sporting FC, but Sporting CP. : - ) ANYWAYS, it's spelled sel-tic.

sorry :p
Sporting CP