Barnwell: It's no lock Derek Carr improves on 2016 leap

As a big contract for the Raiders quarterback looms, how should Oakland weigh the Carr's continual improvement against signs of potential regression after a banner 2016 season?

Last year, over the course of a week, I wrote progress reports for three quarterbacks from the Class of 2014. It was reasonable at the time to suggest that none of those three passers -- Blake Bortles, Teddy Bridgewater or Derek Carr -- had separated from the others. If anything, Bortles was getting the most hype after throwing 35 touchdowns during his second NFL season.A year later, those comparisons seem silly. Bortles continued to be turnover-prone as his mechanics fell apart during his th...