On Friday night Busch, driving for his own team KBM, led 107 out of 150 laps on his way to victory in the Truck series event at the wheel of his trademark #18 Toyota Tundra. It was also his 25th victory in the series, out of 87 events contested since 2001.
On Saturday afternoon, Busch led every single lap to claim his 44th Nationwide Series career victory, his 33rd for Joe Gibbs Racing in the second-tier series. The 25-year-old fended off a late charge from Carl Edwards, who raced him side-by-side for many laps.
Busch was fastest in the final Sprint Cup practice on Friday and on Saturday qualified on the outside of the second row for Sunday's 500km event, which his Nationwide Series rival Edwards starts from pole after setting a new track record in his Roush Fenway Ford.
The Vegas native hopes to get the better of Edwards and his rivals once again on Sunday to complete the sweep and take his 89th victory in a NASCAR national series event.
"I hope so, man," said Busch. "That's the plan. I hope Carl didn't save everything he had for tomorrow. I know I let him sit on the pole so he could speak to the fans in the morning during driver intros... We were joking about that earlier. Our [car] is good, I'll let you know in about 24 hours."
If Busch manages to claim victory in Sunday's Cup event at Phoenix, which he won back in 2006, he would match the feat he already achieved last August when he completed a full sweep at Bristol, winning in Trucks, Nationwide and Cup.
In Saturday's Nationwide race, Busch became the first driver since 2003 to lead every lap of a NASCAR event.
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