Contenders must improve depth

The 2007 draft is over, but all 32 rosters remain a work in progress. Here's a look at what each AFC team still must accomplish before the start of the season. NFC breakdown.

AFC North

Baltimore Ravens
Work to do: The Ravens' top draft priority was to upgrade their offensive line. They made significant strides with the additions of Auburn OG Ben Grubbs and Iowa OT/OG Marshal Yanda. Grubbs has Pro Bowl potential at guard and Yanda should emerge as a solid starter -- either as a guard or right tackle -- in the near future. However, neither project is a potential heir apparent to Jonathan Ogden at left tackle. Although left tackle is not an immediate need, expect the Ravens to be in the market for a high-priced left tackle a year from now -- either in free agency or with a first-round pick in 2008.