It was announced Tuesday evening that Denny Hamlin would be out of the car six weeks after suffering a L1 compression fracture during a wreck at the Auto Club Speedway.

Here's the official announcement from Hamlin's NASCAR Sprint Cup Series team, Joe Gibbs Racing:

HUNTERSVILLE, N.C. (March 26, 2013) – Joe Gibbs Racing (JGR) driver Denny Hamlin was evaluated today by Dr. Jerry Petty of Carolina Neurosurgery & Spine Associates after suffering an L1 Compression Fracture during an accident on the final lap of Sunday’s NASCAR Sprint Cup Series Auto Club 400 at Auto Club Speedway.

Dr. Petty determined that Hamlin will not require surgery, but will need time to properly heal, which is estimated around six weeks time. Dr. Petty will make the determination when Hamlin will be able to return to racing this season.

No decision has been made on a replacement driver for Hamlin during his absence from the NASCAR Sprint Cup Series.

Hamlin suffered the serious injury in a last lap crash during Sunday's Auto Club 400 while racing Joey Logano for the lead. Hamlin's No. 11 FedEx Toyota slammed head first in a concrete wall that was not protected by a SAFER Barrier.