In Kenseth's case, it was a broken axle. After NASCAR called a caution on lap 185 of a scheduled 200, Kenseth pitted from the lead for fuel and tires. But the rear axle broke as he was leaving his pit, dropping Kenseth to a 31st-place finish that belied the strength of his car.
"I let the clutch out to go and the axle broke," Kenseth said. "I don't know why. I didn't do anything different than we ever do, so it just broke. No, I don't think that's luck. An axle breaking is either a faulty part or not the right part or not the gear ratio or ... there's usually a reason.
"We busted one last year

Denny Hamlin (11) leads teammate Matt Kenseth (20) during Sunday's NASCAR Sprint Cup Series race at Auto Club Speedway. / Photo: Doug Pensinger/NASCAR via Getty Images
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