Johnson (knee contusion) is slated to undergo an MRI, Mike Jurecki of FOX Sports 910 Phoenix reports.
Meanwhile, fellow RB Andre Ellington is dealing with turf toe, with the duo's status for this Sunday's game against the Rams yet to be determined. Next up for the Cardinals' carries if either (or both) miss time are David Johnson, Stepfan Taylor and perhaps Kerwynn Williams, who is currently on the team's practice squad.