sports like cricket and rugby are predominantly protestant, and gaelic football and hurling are predominantlyatholic sports. i just realized that i could get both kids to play. they wouldn't look at a basketball and say "oh, that's only for the other side." >> reporter: now, a few years into the program, it seems their idea was a slam dunk. meet mark and dean. >> i'm protestant. >> and i'm a catholic. >> reporter: new to the sport of basketball, they had to put aside their differences to learn how to play. >> when we're on the court practicing together, the religion is just out the window. >> i just know that they are my teammates. and i'll always stick with them. >> reporter: now they're not only practicing together, they hang out off the court too. >> well, the friendships i've made through full court peace have just been amazing. >> like anytime they come knock on my door, i bring them in, give them a bed to sleep because just they're really, really nice guys. >> reporter: after weekly practices alternating between the catholic and protestant schools, the season culminates with a trip to t