The key word in the above sentence is voluntary. As such, many NFL players will decide to skip the offseason workouts at team facilities -- which are restricted to strength and condition and physical rehabilitation -- and train on their own.
Some of the absentee names are bigger than others.
Bryant will skip conditioning work because he has yet to sign his franchise tag. This has become the standard move for players who have been slapped with the tag and are still working to get a long-term deal done. We don't expect players like Bryant, Justin Houston, Jason Pierre-Paul or Demaryius Thomas to show up for these voluntary workouts.
Scandrick, on the other hand, is the Cowboys' top corner and is slated to make just $1.5 million this year. The corner's absence is believed to be related to his contract situation, per Rapoport. Scandrick will presumably sit out in hopes of acquiring a raise out of the situation
Some other notable players not joining teammates at workouts: