Tom Bowles: Five things we learned at Sonoma

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It's been a month filled with controversial calls in sports, from baseball's "imperfect game" to a U.S. World Cup foul that never was. Did NASCAR just join the list, costing a possible first-time winner a shot at salvaging a lost season? An in-depth look at the NASCAR rulebook leads off our agenda, one of five things we learned after NASCAR's first of two road course races in 2010: 1. Marcos Ambrose made one of the biggest blunders in NASCAR history. As the laps wound down at Infineon Raceway, Marcos Ambrose was on the verge of a breakthrough. Coasting to a two-second lead over Jimmie Johnson, he was poised to score his first career win and right the ship of a sophomore slump plagued by six DNFs and just one top-10 finish.

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