I covered Carroll during his tenure with the Miami Dolphins. Here is my scouting report on what he brings to the Eagles:
Carroll, 27, has always been a bit of an enigma. He has good size and runs well. However, he was never able to completely put it all together at cornerback during his four seasons in Miami. Carroll had the best year of his career statistically as a part-time starter for the Dolphins in 2013. But flashes of good plays were sometimes followed by bad plays. Opposing quarterbacks picked on Carroll while opposite Pro Bowl cornerback Brent Grimes -- and the quarterbacks won many of those battles. That was a primary reason the Dolphins were willing to let him walk.
In 2013 Carroll became more of a playmaker, which is good news for the Eagles. He set career highs in interceptions (three), pass defensed (12) and sacks (two) last season. Carroll’s biggest weakness is his inconsistency. But if the Eagles can fix that aspect of his game, he could be productive.
Carroll has good character and will fit in well in Philadelphia’s locker room. He’s a hard worker who doesn’t complain. He’s willing to fill whatever role is asked of him. Miami’s coaching staff used Carroll outside as a cornerback, occasionally as a nickel, when needed, and he also was a backup kickoff returner. Carroll was a fifth-round pick in 2010 and lasted four seasons in Miami because he was a team-first player.