The Colts are shutting down Bobby Turbo and firing up Marlon Mack. Robert Turbin is headed to injured reserve with a dislocated elbow, according to Ian Rapoport of NFL.com (on Twitter). This was the feared, but expected outcome after he suffered the injury on Monday night. 
Turbin has been playing behind Frank Gore and getting a decent number of snaps. That has been a source of frustration for Colts fans and fantasy owners who have been waiting for Mack to get an opportunity to shine. We’ll now find out of Mack can keep his production up with a heavier workload. He has 4.8 yards per carry this year off of 27 attempts, plus two touchdowns.
Turbin’s season ends with 53 yards on the ground and 56 yards through the air. Last year, he enjoyed one of his most productive NFL seasons, running for 164 yards and seven touchdowns.
The veteran has one more year to go on the two-year deal he signed in March, but it’s not a lock that he’ll be back in Indianapolis in 2018.