Davis was taken to the locker room after colliding with Jets running back Bilal Powell late in the second quarter.
The NFL’s concussion protocol requires Davis to be cleared to return by an independent neurologist.
With Davis out, the Colts are left with just three healthy cornerbacks, as Greg Toler and Darius Butler were inactive for the game due to injury. The Colts lost to the Jets 20-7 to fall to 0-2 on the season.
- Dan Gartland