It appears it was not, in fact an injury that held David Johnson out of the final two voluntary organized team activities last week.
No, instead it seems we have a good ol’ fashioned holdout on our hands as the Arizona Cardinals star running back will not be attending mandatory mini-camp per Adam Schefter:
Cardinals’ RB David Johnson is skipping this week’s mandatory minicamp that begins today, per league sources.— Adam Schefter (@AdamSchefter) June 12, 2018
There have been discussions regarding a new contract and both sides hopeful. Johnson scheduled to make $1.8 million in last year of his deal.