I think the comments about sports on the websites are probably referring to intramural sports. I'm only guessing though.
I played just about every intramural offered, football, soccer, softball, swimming, badmitton and chinese checkers (really) among others, (our unit always put teams together) those won't get you out of PT. But who cares, it's just PT for crying out loud, so it shouldn't be your main reason for taking up a sport.
We did have a few guys who played on the actual football team, (it was the CMU team though...), and a few Pitt swimmers, who all did just fine. Most eeked by with pretty basic majors and did the minimum to graduate. Which I can't really argue with. Everyones got their priorities.
Basically you can do both, but don't be surprised when a situation pops up where you need to make a desicion to let one go.
Oh, and also, be very very careful about sports related injuries. We had a guy his freshman year blow out his knee really badly playing on the football team. It caused a few hiccups in his ROTC scholarship money and is now potentially harming his chances of even being commissioned.
An edit from earlier: I gave up my sport because I could make every practice, but due to ROTC and school commitments I could only make like 1 game a season. I figured it not be worth it for me.