Cory Redding has announced his retirement after 13 years in the NFL.

Redding played in 12 games on the defensive line for the Arizona Cardinals last season and finished the year on injured reserve. He was released by the team in April.

"I'm leaving the game I've played for 23 years. Thanks to the teams I played for, coaches, teammates, fans and my family 4 their support," he announced on Twitter.

Redding, 35, was a third-round pick out of Texas by the Detroit Lions in 2003.

Patrick Peterson told NBC Sports Radio that he believes J.J. Nelson will have a breakout year for the Arizona Cardinals.

"I believe J.J. Nelson's going to have a great year," Peterson said. "He had a great, great spring, showed some flashes. I can't wait to see what he's going to do here if he can keep that momentum going into summer camp because I've seen it happen a number of times."

Bruce Arians has praised the second-year receiver as well.

Nelson had 11 receptions for 299 yards and two touchdowns in 2015.

"Guys have great springs but once they get in front of a couple of fans and the crowd, the lights come on, you get a different player," Peterson said. "So J.J. is definitely one of them that had a great spring."

Bruce Arians felt betrayed by the Pittsburgh Steelers when they let him go after the 2011 season.

Arians was offensive coordinator from 2007 until 2011.

"I got a call on Monday and [Tomlin] said, 'I can't get you the money.' I said, 'OK,'" Arians said. "He said, 'No, I can't get you a contract.'

"I said, 'Are you firing me?' He said, 'No.' 'Well ... it's just a matter of words, Mike. OK. If I don't have a contract, I'm fired.'"

The Steelers made two Super Bowl appearances with Arians as offensive coordinator, winning the title in 2008. Explaining why he felt betrayed, Arians said it was because he felt he had "done a good job."

"Maybe not the right image, but it was a damn good job," he said. "I was pissed. But again, time heals things."

Arians moved onto the Indianapolis Colts before becoming head coach of the Arizona Cardinals in 2013.