A quick search tells me that Ayers fell out of favor in 2014 with then new Titans coach Whisenhunt. He also had offseason surgery on both knees.
Here’s something about 2013:
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http://www.tennessean.com/story/titansinsider/2014/06/02/titans-nfl-tennessee-sports-nashville-akeem-ayers/9877161/
Ayers said he played through the injuries last year. He played in all 16 games, starting 14, but recorded career lows in tackles (56), sacks (one) and quarterback pressures (four).
“It was actually pretty bad even before the season started,” he said. “I didn’t know the severity of the injury until pretty much after the season. I pretty much thought it was soreness or pain that would eventually go away.
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Here’s something from an article from early 2014:
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http://www.tennessean.com/story/sports/nfl/titans/2014/10/03/tennessee-titans-akeem-ayers-nfl-cleveland-browns/16664993/
A second-round draft pick by the Titans in 2011 out of UCLA, Ayers was a regular starter in his first three seasons. He started 44 of 48 games from 2011-13 and even posted a triple-digit tackle total (110) in his second NFL season.
He’s been an invisible man under a skeptical new coaching staff this season, however. Ayers hasn’t dressed out the past two weeks and has played just once all season. He’s champing at the bit to get back on the field.
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Ayers clearly has something to prove to his new coaches. They weren’t impressed with the film they saw from Ayers last season, and he hasn’t blown them away in the past eight months either. Ayers dealt with knee injuries a year ago, which he acknowledges limited his production.
“When he gets his opportunity we expect to see production, and see him compete. I’m expecting consistency,” Whisenhunt said. “The only way he is going to get back on the field is if that happens. He needs to be consistent in his approach and not making mistakes. … (Whether he plays) is really going to be up to him as far as how he prepares and does on the practice field.”