Motorsports this weekend: October 29-30

A fairly quiet weekend in big-league motorsports, as we edge into the "off season."

WRC: Rally Catalunya is already underway. World Champion Sebastien Loeb will be doing his best to put the manufacturer's championship on ice for Citroen. Peugeot, the only other team in the running, are lying 30 points behind coming off Loeb and Citroen's dominating performance in Corsica last week.

NASCAR: The Chase for the Championship moves into the final four with this weekend's race at Atlanta Motor Speedway. Tony Stewart holds a 15 point lead over Jimmie Johnson, and 63 points over Ryan Newman. (NBC, noon Sunday ET)

IROC: The International Race of Champions winds up the season at Atlanta Motor Speedway Saturday.