Boone (concussion) won't return to Sunday's game against the Colts, Chad Graff of The Athletic reports.
Boone was forced to enter the protocol in the second quarter, and he won't return to the game when his team returns in the third quarter. The Cincinnati product will now need to gain clearance from independent league doctors before returning to action. Ameer Abdullah and Alexander Mattison will handle depth running back duties with Boone sidelined.