Chicago Bears

Trouble is brewing at cornerback, where Kyle Fuller’s Week 1 availability is in question after a recent knee scope and nickel man

Bryce Callahan is sidelined with a hamstring injury.

Even at full strength, the depth of the position was a concern. With second-year players De

Vante Bausby and Jacoby Glenn (concussion) also sidelined, GM Ryan Pace is likely to explore the free agent market.

Tracy Porter, 30, who’s having a nice offseason but ran out of gas late in 2015 and has started 16 games once in eight seasons, is anchoring the group. Fourthrounder Deiondre Hall has impressed, but the Bears have brought the former Football Championship Subdivision standout along slowly.

The offseason front-seven transformation was expected to cover up shortcomings in the secondary, a task that becomes more difficult as the cornerback corps is increasingly shorthanded.

Rookie watch: Third-round DE Jonathan Bullard and firstround OLB Leonard Floyd combined for a sack against the New England Patriots, another bright flash for this explosive tandem. ... With top kick returner Deonte

Thompson suffering an ankle injury last week, seventh-rounder

Daniel Braverman and undrafted Kieren Duncan could get opportunities to claim what remains an unsettled role. … Fifth-round RB Jordan Howard, known mostly for his powerful downhill running, showcased creativity en route to an impressive 46 yards on 11 carries.

Noteworthy: Key offensive cogs RB Jeremy Langford and RG Kyle Long excelled Thursday but potentially at a cost: Langford was in a walking boot Saturday, and Long has a shoulder injury. …

Connor Shaw has outplayed David Fales in the No. 3 QB battle. Shaw orchestrated an impressive touchdown drive late in the Patriots game.