Carol: I can't recall anything from recent canon, but my headcanon is that although she's not a superfan, Carol's still loyal to the Red Sox. She obviously incredibly fit, but she usually works out by running or punching things (or sparring with other Avengers). She's game for a casual match of whatever, the more bizarre the better.

Mary: Is an accomplished equestrian. Competing would be unladylike, but if riding were more than just a diversion to her, she'd be very good. And she of course attends the races during the Season, and has been known to enjoy a friendly cricket match at Downton.

Stiles: Plays lacrosse (poorly) and runs cross country (also poorly, and only because it's required for out of season lacrosse players). Any other sports he plays involve a video game console (running for your life = not actually a sport). Made the rounds of Parks & Rec sponsored soccer, baseball, etc. in elementary school and was, even then, enthusiastic but distressingly average at all of it.