Although the Denver Roller Dolls and Rocky Mountain Rollergirls are often billed as crosstown rivals, their traveling all-star teams hardly ever skate against each other: The last time DRD’s Mile Club ...

What to Know Roller derby is a full contact sport, reborn in the 2000s, that’s played by two teams of five roller skaters on an oval track Olympic speed skating gold medalist Erin Jackson plays roller ...