Giants have announced that Pierre-Paul had a herniated disc in his lower back repaired and will be out 12 weeks.

Jason Pierre-Paul, the 24-year-old Giants defensive end, is in Los Angeles to undergo back surgery this morning, The Star-Ledger has confirmed.

Pierre-Paul is expected to recover from the procedure, performed by physician Robert Watkins, for the start of the 2013 season, according to ESPN, which first reported Pierre-Paul's surgery. However, he will likely begin training camp on the Physically Unable to Perform (PUP) list. The Giants open the regular season Sept. 8 in Arlington, Texas, against the Dallas Cowboys.

The Giants have announced that Pierre-Paul had a herniated disc in his lower back repaired. Rehab and recovery time is expected to be 12 weeks.

"My back has been bothering me for a while, and even last season I played through some back issues," Pierre-Paul said in a statement. "The treatment I've been doing has helped manage the issue, but this procedure is going to get me fully healthy and there should be no more pain."

Pierre-Paul's sack total dropped from 16 1/2 two years ago, a career high, to 6 1/2 last season. According to ESPN, Pierre-Paul received epidural injections during the 2012 season to ease the pain of a nagging back injury. The nature of Pierre-Paul's injury is uncertain.

Selected 15th overall out of South Florida by the Giants in the 2010 NFL Draft, Pierre-Paul occasionally suffered from back issues during his college career, though he never missed more than a few days at a time.

Tom Coughlin, the Giants coach, hinted in March that Pierre-Paul reported to training camp overweight last summer, inferring the defensive end was in weaker condition than the previous season.

Pierre-Paul later disputed the claim, saying his playing weight the past two seasons has not fluctuated, but he didn’t complain publicly about his back.

"I was always in great shape," Pierre-Paul said in April. "I'm still the same size this year. People say I look slimmer but I'm the same weight.