This is what is called damage control, but it makes sense. Jenkins is only due to make $1 million this season. Why trade a competent, experienced cornerback for pennies on the dollar? Jenkins has gone through slumps before (2010), but he was probably the team's best cornerback last year. (Of course, that's like being the tallest guy at a Rosenthal family reunion.)
Maybe No. 6 overall pick Morris Claiborne is the answer, but you can't have too many cornerbacks. In this era of four wide receiver sets, teams essentially start three cornerbacks. Why not match up with those four wide receivers with four solid corners? The strong safety is becoming extinct.