*In an interview set to air Sunday on CBS, imprisoned Plaxico Burress is vowing a return to the NFL and offered an apology to the New York Giants for tarnishing the organization.

“I will play again,” Burress said in the interview with his former Steelers coach, Bill Cowher, scheduled to air on CBS’ “NFL Today.”

According to the New York Post, the interview took place from the upstate New York prison where the receiver is currently housed after pleading guilty to attempted weapons possession in the second degree.

Burress said he works out about four times a week in the prison to keep in shape for a possible comeback.

“It’s not LA Fitness or Bally’s, but I do push-ups, sit-ups,” Burress said in the interview. “I make do.”

Cowher, who was Burress’ coach for five years in Pittsburgh, told the New York Post that he believed the receiver was sincere in the interview.

“He looked me in the eye. I believe he was sincere,” Cowher told the newspaper. “I think I know him well enough to know that. …He admittedly blames no one except himself. He’s had a lot of time to reflect. He’s had great, unwavering support from his wife. … It’s been an eye-awakening situation for him. He had a daughter born when he was in prison. It’s very sobering to be in there. When you walk through the door, and you listen to him talk, you can see it’s very genuine.”

Burress’ work-release application was denied by the New York Department of Correctional Services last month because of the nature of his crime. He’s expected to serve about 20 months of his two year sentence, with credit for good behavior — meaning he could be released as early as spring 2011 — followed by two years of probation.

The athlete also said he wrote a letter to Giants owners John Mara and Steve Tisch apologizing for his actions.

“I told them how sorry I was about bringing all this bad publicity to such a stand-up organization,” Burress said in the interview with Cowher.