"I've got to be supportive, and not walk away from a guy that maybe made a mistake," Penske said. "We've had lots of conversations. I told him he's got to pull his guys together. He spent a lot of quality time with his crew on Thursday.
"The biggest disappointment I had was, I wasn't there to maybe keep that situation from happening."
Asked if he expects someone with Busch's racing experience (he's the 2004 Cup champion) to control his frustrations better, Penske didn't respond directly.
"You always look back and ask yourself, 'Why did I put myself in that situation?' '' he said. "These are high-strung guys on the race track. Kurt has great talent in driving."
Petty sub impressive
Chad McCumbee, appearing in his first Cup race as a one-race replacement for Kyle Petty, made an impressive debut.
McCumbee finished 25th. He drove the No. 45 Dodge while Petty served as an analyst for the TNT telecast.
"Winning the ARCA race [on Saturday] gave me a lot of confidence," McCumbee, 22, said.
Before the race, he said he hoped to finish on the lead lap, and said, "A top 20 or 25 would be really good."
McCumbee portrayed Dale Earnhardt Jr. in the movie "3", about the life and death of seven-time Cup champion Dale Earnhardt Sr.
Hendrick Motorsports drivers have won 10 of the season's 14 races . . . Rick Hendrick has more wins (11) at Pocono than any other car owner . . . Carl Edwards won his fourth Busch series race of the year Saturday night at Nashville. He leads Kevin Harvick by 472 points in the Busch standings. Edwards hasn't won a Cup race since November 2005.
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