Beth "Fiona Grapple" Bandimere is a blocker for the Rocky Mountain Rollergirls' Sugar Kill Gang and team captain of the 5280 Fight Club all-star squad, and already has a national roller derby championship title to show for herself. Her nom de derby channels mid-'90s malcontent Fiona Apple, rather obviously, but also captures the full spirit of fighting for every inch on the track, which Ms. Grapple, a bludgeon of a blocker, embodies as well as anybody. This year, however, thanks to the reductive reality-TV shorthand of CBS's The Amazing Race, Bandimere and her 5280 Fight Club teammate Mona "Triple Shot Misto" Egender came to be known as the "Roller Derby Moms," a pair of clean-cut competitors, each with three kids, who held their own on the show.