B.Brooks thinks the Lions might go Dline with the first pick. ------23Whitney MercilusDEIllinoisThe declining play of Kyle Vanden Bosch and free agent status of Cliff Avril could lead the Lions to make a play for the most productive sack artist in college football last season. Although some have labeled Mercilus as a one-year wonder, his production and athleticism are tough to ignore.Pick No. 24 MARK BARRON SS Alabama The Steelers have a strong reputation for grooming young players for pivotal roles. Barron would give the team an instinctive defender to groom behind Troy Polamalu and Ryan Clark.