After jumping straight from the Craftsman Truck Series to the Nextel Cup with Jack Roush, Kurt Busch had never driven in a NASCAR Busch Series race until this weekend at the Texas Motor Speedway.

Now, as he prepares for Sunday's Samsung/RadioShack 500, Busch can not only say that he has started a race in NASCAR's second series but that he has also won a race in NASCAR's second series.

Driving for Penske Racing's part-time #39 Busch team, the 2004 Nextel Cup Champion led yet another Cup series parade in Saturday's O'Reilly 300 as 12 of the top 15 finishers came from the Cup Series.

Busch survived a green-white-chequered flag finish to take the race from his former Roush teammate Greg Biffle, Chip Ganassi Racing's Casey Mears and his younger brother Kyle Busch.

Matt Kenseth, who will have to start from the rear of the grid for Sunday's Nextel Cup race after blowing an engine in final practice, finished sixth, leading home the first Busch Series regular, DEI's Paul Menard, and four more Cup regulars, Kevin Harvick, Scott Wimmer, pole-man Denny Hamlin and Cup Series polesitter Kasey Kahne.

15 of the 17 drivers who will compete in Sunday's Cup race finished in the top 25, making it a very lean day for the Busch regulars with only JJ Yeley and Carl Edwards, who both retired, failing to make an impression on the final classification.