The court battles continue for NASCAR owner/driver Jeremy Mayfield, who has been knocked out of the racing circles again by the U.S. Circuit Court of Appeals.

As practice started for the Sprint Cup regulars at the Indianapolis Speedway, the U.S. Circuit Court of Appeals has overturned the injunction that would have allowed Mayfield to resume racing in NASCAR's top division.

Mayfield was originally suspended indefinitely on May 9 for failing a random drug test that was sanctioned by NASCAR's testing body.

Mayfield tested positive for methamphetamine; since then, he has been appealing the test results in court.

His injunction was originally overturned on July 1 after a judge ruled that NASCAR testing system was flawed.

During that time, NASCAR alleges that Mayfield failed a subsequent drug test on July 6.

Mayfield's team has not been entered in this weekend's race at the Brickyard, since all of Mayfield Motorsports' employees resigned this week.

Since the beginning of the saga, Mayfield has always denied using the illegal drug, but with both sides unwilling to back down, it seems that this back-and-forth battle will continue into the unforeseeable future.