The offseason work period really gets going between now and early July for most NFL teams.
Here is the Cowboys' offseason/training camp schedule
ORGANIZED TEAM ACTIVITIES (OTAs)
Dates: May 17-19, May 24-26, June 1-3, June 8-10
OTA practices are closed to fans and open to the media for one day only for each three-day period.
Dates: June 11-13
Minicamp closed to fans; open to the media.
San Antonio: July 24-Aug. 6
Cowboys will practice Aug. 10-11 at Valley Ranch as it prepares for a Aug. 12 preseason game vs. Oakland.
Oxnard, Calif.: Aug. 14-27
Training camp practices are open to the public and media; times have not been determined.