Bears RB Khalil Herbert going on injured reserve

Ashlee Rezin/Sun-Times

Chicago Bears running back Khalil Herbert #24 runs the ball during the first quarter against the Detroit Lions at Soldier Field on Sunday. | Ashlee Rezin/Sun-TimesBears running back Khalil Herbert is headed to injured reserve after hurting his hip late on a kick return late during Sunday’s loss to the Lions.

His loss is a blow to the league’s best rushing attack. He averaged 6 yards per carry, which is tied with the Cowboys’ Tony Pollard for the most by any healthy running back in the NFL.

Herbert has run 108 times for 643 yards this season while sharing backfield duties with David Montgomery. Montgomery, who is in the final year of his contract, has run 115 times for…