An abbreviated look at what’s going on around the NFL on Thursday, Aug. 11:
• Johnny Knox has been dropped below recent acquisition Roy Williams on Chicago's WR depth chart, with offensive coordinator Mike Martz saying Knox "just was not ready" to start.
• And speaking of the Bears' depth chart, Roberto Garza is currently penciled in as the starter at center, replacing Olin Kruetz. Chicago signed ex-Seattle center Chris Spencer after letting Kruetz walk, but Garza has the edge so far.
• Matthew Stafford is expected to start in Detroit's preseason opener vs. Cincinnati Friday, but he may not have Calvin Johnson to throw to. Johnson sat out the second half of the Lions' Thursday practice with an ankle injury, putting his game status in doubt.
• Dallas Clark is back with the Colts after a wrist injury cost him the final 10 games of 2010. He says that he will probably wear a brace over his surgically-repaired right wrist throughout the 2011 season -- adding that the brace doesn't cause him any issues except that it "just looks stupid." • The Dolphins plan to play their rookies a lot this season, especially center Mike Pouncey. One other name to remember: Clyde Gates, a WR out of Abilene Christian, who's opened some eyes this offseason.