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

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.

NEWS: AJ Allmendinger has failed a random drug test by NASCAR. Sam Hornish will drive the No. 22 Dodge tonight at Daytona.

— Marty Smith (@MartySmithESPN) July 7, 2012

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

The positive A-Sample was taken from Allmendinger during a random drug test at Kentucky Speedway.

— Marty Smith (@MartySmithESPN) July 7, 2012

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

We do not know what substance was found in Allmendinger's drug test. NASCAR did not mention it and did not take questions.

— Marty Smith (@MartySmithESPN) July 7, 2012

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

Note- No comments on 22 car tonight as we focus on tonight's race.
Thank u in advance.

— Brad Keselowski (@keselowski) July 7, 2012