The defensive tackle says he will enter the 2009 NFL Draft, giving up his final year of eligibility witht he Tigers.
"I've had a great experience during the last four years at Auburn," Marks says. "However, I feel that it's in my best interest to enter my name into the 2009 NFL Draft. It's always been a dream of mine and I feel that I'm ready to advance to the next level."
Marks, a second team All-SEC pick this past season despite suffering a pair of ankle sprains that limited his mobility, was a preseason All-America pick. He was a three-year starter for the Tigers after redshirting as a freshman after signing with Tommy Tuberville's staff in 2005.
On Monday night, new Auburn head coach Gene Chizik said he had talked to Marks and hoped he would stay at Auburn for one more season. However, that is not going to happen.
"Auburn is, and always will be a special place to me," Marks adds. "I want to thank all of my coaches at Auburn for giving me the opportunity to play college football and get an education. The Auburn family and my teammates have always been very supportive of my family and me, and for that I'm very appreciative."
Another Auburn defensive lineman, redshirt junior end Antonio Coleman, says he will announce a decision on whether he is returning or going pro on Jan. 3rd at Williamson High in Mobile where he was a standout performer.