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You can easily see why a CB is the most logical choice as the pros outweigh the cons in getting a CB. This is a absolute need at this position. The only way I see the Chargers getting a top DE, OL, or OLB before a CB is if they trade two or three out of their top five picks in the first three rounds to move up in the draft to also take a top talented CB. That I don't really see happening as the Chargers need every pick in the first three rounds to replace many players that the Chargers won't retain due to losses of personnel to the free agency.
Taking a CB is the obvious choice. Here is a quick recap of the reasons to take a CB again:
1. Provide depth behind Quentin Jammer and Antoine Cason.
2. Give Chargers insurance policy in case Cason doesn't make transition to Greg Manusky's defense.
3. Need for a capable nickelback player in ultra-aggressive scheme.
4. Possible move of Quentin Jammer to strong safety.
5. Punt team need a capable "gunner" on special teams.
I'm sure after reading this article, you can see why I believe this is a move the Chargers should make. Are they going to make this move? I can't say for sure but if there is one thing I do know, AJ Smith have already have thought about this since he hired Manusky as the defensive coordinator as he now have to curb the roster to fit his defense. As far as I can see, the Chargers only have questions at strong safety, nose tackle, and cornerback in this new scheme. Of those three, CB is the biggest need as the strong safety and nose tackle will be given chances to prove they can play in the new scheme and they have depth at those positions.