The next three days of work isn't voluntary for players of two NFL teams.
All teams may hold one mandatory minicamp for veteran players in Phase Three of offseason workouts, per the collective bargaining agreement. No live contact is permitted during Phase Three, but 7-on-7, 9-on-7, and 11-on-11 drills are allowed.
All players currently under contract are required to attend minicamp or could be subject to fines at the team's discretion (franchise tagged players who have not signed their tender are not under contract and therefore not subject to fines). Per the CBA, unexcused failure to report to or unexcused departure from mandatory offseason minicamp can result in daily fines, totaling $80,405 for missing all three days -- $13,400 for missing the first day and escalating fines each day absent.
The 30 other NFL clubs will hold their mandatory minicamps next week.
Today, the Cards and Pats own the show.