Out this week
Montgomery (ankle/knee) has been ruled out for Sunday's game against the Giants.
Montgomery hasn't practiced since his early exit from a Week 3 win over Houston. His departure set up a career-best showing from Khalil Herbert, who is inferior to Montgomery as a blocker and receiver but arguably superior as a pure runner. Trestan Ebner took over the backup role after Montgomery's departure last week, while Darrynton Evans could be called up from the practice squad before Sunday. Herbert figures to start and get the bulk of carries.
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Harry caught a 49-yard pass in the Bears' 28-19 loss to the Packers on Sunday.
St. Brown caught three of four targets for 85 yards in Sunday's 28-19 loss to the Packers. He also rushed once for a yard.
Claypool caught five of six targets for 28 yards but lost a fumble in Sunday's 28-19 loss to the Packers.
Kmet caught six of seven targets for 72 yards in Sunday's 28-19 loss to the Packers.
Montgomery rushed 14 times for 61 yards and a touchdown in Sunday's 28-19 loss to the Packers. He also caught four of five targets for six yards.
Fields completed 20 of 25 passes for 254 yards and two interceptions in Sunday's 28-19 loss to the Packers. He also rushed six times for 71 yards and a touchdown.
Pettis (illness) doesn't have an injury designation for Sunday's game against the Packers.
Coach Matt Eberflus said Friday that Siemian will undergo season-ending surgery on his oblique, Jason Lieser of the Chicago Sun-Times reports.
Fields (shoulder) practiced fully Friday and doesn't have a designation for Sunday's contest against the Packers, Courtney Cronin of ESPN.com reports.
Pettis (illness) was a non-participant in Thursday's practice.