Cardinals' Chris Johnson is out for season

Cardinals' Chris Johnson is out for season

The Arizona Cardinals put Chris Johnson on the injured reserve/designated to return list, a move that means the only way the running back will play again this season is if the team reaches the Super Bowl.

A person with knowledge of the situation said Tuesday that Johnson chipped or fractured his left tibia where it meets the knee. The person spoke on condition of anonymity because the team has not revealed details of the injury.

Johnson, 30, is fourth in the NFL in rushing with 812 yards.

Patriots' Rob Gronkowski has a bone bruise on knee

Tight end Rob Gronkowski suffered a bone...