During a chat with the Miami Dolphins media, Cincinnati Bengals defensive end Geno Atkins spoke about playing through knee issues earlier this year.
"Its really more mental than physical...You are more favoring (the other knee). It took me four weeks,"Atkins on playing through knee issues— Omar Kelly (@OmarKelly) October 29, 2013
Obviously context can be lost with awful twitter limitations.
We looked through the team's injury and practice reports throughout the year and he hasn't appeared. Atkins did have a scary moment during training in 2012 when trainers were looking at his left knee, but that lasted all of two minutes. However, unless Atkins misses time during practice (which he literally doesn't do), then it makes sense that he'd be absent from those reports.
Atkins had a slow start this year against the run, but he's still leading the team with 5.0 quarterback sacks, posting at least a shared sack in all but two games (Bears, Lions).
However, unless we've completely missed something (which wouldn't be a first), this is the first we've heard about it.