There are the so-called dumb jocks and then there are athletic geniuses (for example, Alan Turing was an extremely good runner). You could easily end up with a skilled team featuring a large gap in IQ scores. The endpoints of this gap would have overlapping interests despite the intelligence difference.

When I was in high school, I was a skinny nerd that could barely bench-press the bar. But I spent most of my senior year eating my lunches with some guys from the football and track teams, including a lineman who went on to the NFL.

These guys weren't dumb. They generally weren't academic stars -- they did well enough in school not to embarrass themselves in college applications, but they spent their time on the field instead of studying and it showed in grades. But they were quick and clever and could enjoy an intelligent conversation -- often a more intelligent one than the nerdy clique, once you'd exhausted the possibilities of Warhammer and Counterstrike.

(A couple years later, I discovered fencing.)