Larson finally stumbles in NASCAR's championship. Was it just a bad day or sign of serious trouble?
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What happened
(AP) — Kyle Larson climbed out of his beat-up No. 5 Chevrolet with a dejected look on his face, stewing about a 34th-place finish at Phoenix Raceway after a flat front right tire caused him to hit the wall.
Summary assembled by rule from the sources below