An abbreviated look at what’s going on around the NFL on Friday, Aug. 19:
• Danario Alexander is trying to push past constant issues with his left knee to play a major role in St. Louis' offense this season. Alexander had 20 catches in his rookie season and, if he can stay healthy, could be a big weapon for Sam Bradford.
• Detroit signed running backs Mike Bell and Jerome Harrison just three days before the team's first preseason game. Lions coach Jim Schwartz says he's holding off judgment of the two until he gets a longer look at them in action.
• Bruce Campbell, Oakland's fourth-round pick in the 2010 draft, should see more playing time as the preseason rolls along. The Raiders are counting on Campbell to develop into a starter this season. • Even with the loss of Todd Heap to Arizona, the Ravens are stockpiled at tight end. That's making Davon Drew's attempt to claim a roster spot difficult.