X-rays came back negative on Johnson's wrist and he'll undergo an MRI on Monday, a source informed of the injury told NFL Network Insider Ian Rapoport. The preliminary diagnosis is a sprained wrist, Rapoport added.
Prior to exiting, Johnson's 2017 debut was far from what the Cardinals -- and most fantasy owners -- had expected. The running back posted just 23 yards on 11 carries and fumbled twice, losing one. He did have six catches for 68 yards, however.
Johnson was actually shaken up twice in the game. Once in the first half when he took a shot to the ribs and needed to take the ensuing play off (a Kerwynn Williams goal-line touchdown run). The next came on his final carry of the game in the third quarter, when he injured his wrist trying to tackle Lions rookie linebacker Jarrad Davis, who had scooped up Johnson's fumble.