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AJ Allmendinger fails NASCAR random drug test, will not race at Daytona

AJ Allmendinger failed a random NASCAR drug test recently and has been pulled from the Coke Zero 400 race at Daytona Saturday night, ESPN's Marty Smith reported on Twitter. Allmendinger is "temporarily suspended" from racing. Sam Hornish Jr. will replace Allmendinger in Daytona on Saturday.

The positive sample came from testing last weekend in Kentucky before the Quaker State 400. Allmendinger currently ranks 23rd in Sprint Cup points.

NASCAR did not get into specifics about what caused the positive test. Allmendinger can request a test of his "B" sample within 72 hours.

Meanwhile, Penske Racing teammate Brad Keselowski preemptively tweeted that he would not comment on Allmendinger's failed drug test.

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