The NFL has released the organized training activities schedule for all 32 teams. Here is what the Raiders schedule looks like:
First Day: April 22.
Veterans allowed at the facility to work out for first time.
NFL Draft: May 8-10
Rookie minicamp: TBD (Within a couple weeks of the draft)
All drafted rookies, undrafted free agent rookies, and tryout players attend.
OTA Offseason Workouts: May 27-28, May 30, June 2-3, June 5, June 9-12.
Mandatory Minicamp: June 17-19.
The dates for training camp are not set yet. Those dates will be set once the preseason schedule is released.