The NFL released the schedule for official off-season workouts for teams Friday.

The Vikings players can start on April 18.

Organized Team Activities at Winter Park are May 24-26, May 31-June 2, and June 6-9.

Mandatory mini-camp at Winter Park will be June 14-16.

The team is preparing for the NFL Draft, which is on April 29-May 1.

Here's the team-by-team schedule.

According to the NFL, there are three phases to its offseason programs. Here they are:

Phase One consists of the first two weeks of the program with activities limited to strength and conditioning and physical rehabilitation only.

Phase Two consists of the next three weeks of the program. On-field workouts may include individual player instruction and drills as well as team practice conducted on a "separates" basis. No live contact or team offense vs. team defense drills are permitted.

Phase Three consists of the next four weeks of the program. Teams may conduct a total of 10 days of organized team practice activity, or "OTAs". No live contact is permitted, but 7-on-7, 9-on-7, and 11-on-11 drills are permitted.

None of these workouts is open to the public.