For the first time in 736 races, Jeff Gordon may have to miss the Coca-Cola 600 tomorrow at NASCAR's longest race. During practice laps on Saturday morning, Gordon was suffering from back spasms and only completed 11 laps. According to a NASCAR.com article,

Gordon, a three-time Coca-Cola 600 winner, ran 11 laps in Saturday morning's practice, the fewest of any driver in the 43-car field. He clocked the sixth-fastest lap in the Hendrick Motorsports No. 24 Chevrolet, but opted out of any further track time.

Gordon underwent a procedure to help with his back problems back in May of 2009.

According to the same article Gordon said,

It's unfortunate, I've had some spasms in the past, but this one's a little bit different. Just want to be cautious and take care of it. It doesn't do me any good to be in the car right now, especially with the car as good as it is. It's all about being ready for 600 miles tomorrow.

According to Gordon's Twitter Page, he plans on running tomorrow:

As of right now, no official announcement has been made about whether or not he will run the race however, Nationwide Series young gun Regan Smith will be on Standby for the No. 24 team. Jeff Gordon has not missed a start in his Sprint Cup Series career.