Chicago could be facing its first subway series since, well, since almost before there was a subway. It’s just that it will be transplanted — if it does happen — to Oklahoma City, Oklahoma. That’s where both Northwestern and DePaul begin play Thursday in the Women’s (softball) College World Series. Among all the top-seeded teams only DePaul, at 14, is an interloper among the final eight, having beaten No. 3 Oklahoma in the super regionals last weekend. DePaul is riding a hot hand in pitcher Tracie Adix, 21-2, who beat Oklahoma in the first of three games, then came on to preserve a lead in game three with a hitless relief appearance for a 7-2 final Sunday. She hasn’t been scored on in 21 postseason innings — a performance worthy of Orel Hershiser, if not Whitey Ford or Babe Ruth. And with her low-bending delivery and late-breaking screwball, she’s been fun to watch on ESPN. On Sunday, Linda Secka made a catch reminiscent of one of the best I’ve ever seen: Dave Martinez backhanded into short right-center field at Wrigley. Secka, who like Martinez is a left-handed center fielder, made her grab in the same area, and when she came off the field her teammates greeted her as if she’d hit a game-winning homer. That’s what collegiate sports at this level is all about. The Blue Demons play Thursday at noon against Washington, with second-seeded Northwestern following at 2 against Arizona State; both games will be carried on ESPN. If both win, they’ll play Friday; if both lose, they’ll play Saturday in the double-elimination tournament, with the loser going home. And if one wins and the other loses, they’ll perhaps meet down the road, maybe in the championship.