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These two free agents share a slide because the status of one of these players should directly effect the status of the other.
Shaughnessy has been expected to be a breakout star for the last couple of offseasons, but he never seems to reach that potential many believe he has.
After racking up 11 sacks over his first two years in the NFL, a shoulder injury ended his 2011 season after three games, and he never seemed to return to his prior form.
He had a career low (with the exception of 2011) in sacks with 3.5 in all of 2012.
Carter, meanwhile, joined the team midseason to help the Raiders pass rush after being a Pro-Bowl player in New England, but he also seemed slowed by a previous injury in 2012.
The difference between the two is that Carter showed signs of his previous self late in the year with 2.5 sacks and a forced fumble, while Shaughnessy never seemed to recover fully.
There isn't room for both of these players, especially with Lamarr Houston fortifying the other defensive end spot.
It is possible that one of these players accepts a rotational role on the team, coming in to spell a teammate, but if I have to pick one, I pick Carter.
Carter can be the team leader the defense so badly needs right now with Seymour and McClain likely departing. Carter showed he still has some gas in the tank, while Shaughnessy looks like his shoulder injury has gotten the better of him.