NFL free agency has already seen the bulk of its action, and the draft will be held from April 25-27.

But April is also the month when NFL teams begin the first of three phases of their voluntary offseason workout programs.

The earliest ones will start on April 2 for teams that have new head coaches. That group includes the Los Angeles Chargers' Jim Harbaugh, Atlanta Falcons' Raheem Morris and Washington Commanders' Dan Quinn.

The Carolina Panthers, New England Patriots, Seattle Seahawks and Tennessee Titans, who also have new coaches, will start on April 8.

The two-time defending champion Kansas City Chiefs and the rest of the NFL teams will open on April 15.

NFL STATS CENTRAL: The latest NFL scores, schedules, odds, stats and more.

Here are the dates for each team's offseason programs plus rules on the three phases:

​Arizona Cardinals

First day: April 15

OTA offseason workouts: May 20-22, May 28-30, June 3-6

Mandatory minicamp: June 11-13

Atlanta Falcons

First day: April 2

Voluntary minicamp: April 22-24

OTA offseason workouts: May 13-14, May 16, May 20-21, May 23, June 3-4, June 6

Mandatory minicamp: June 10-12

Baltimore Ravens

First day: April 15

OTA offseason workouts: May 20, May 22-23, May 28, May 30-31, June 3-4, June 6-7

Mandatory minicamp: June 11-13

Buffalo Bills

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 28-30, June 3-4, June 6

Mandatory minicamp: June 11-13

Carolina Panthers

First day: April 8

Voluntary minicamp: April 23-25

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31, June 3-4, June 6

Mandatory minicamp: June 11-13

Chicago Bears

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31

Mandatory minicamp: June 4-6

Cincinnati Bengals

First day: April 15

OTA offseason workouts: May 28-30, June 3-6

Mandatory minicamp: June 11-13

Cleveland Browns

First day: April 15

OTA offseason workouts: May 21-23, May 28-30, June 3-6

Mandatory minicamp: June 11-13

Dallas Cowboys

First day: April 15

OTA offseason workouts: May 21-23, May 29-31

Mandatory minicamp: June 4-6

Denver Broncos

First day: April 15

OTA offseason workouts: May 21-23, May 28-30, June 3-6

Mandatory minicamp: June 11-13

Detroit Lions

First day: April 15

OTA offseason workouts: May 21-23, May 29-31, June 10-12

Mandatory minicamp: June 4-6

Green Bay Packers

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31, June 3-4, June 6

Mandatory minicamp: June 11-13

Houston Texans

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 29-31, June 3-4, June 6

Mandatory minicamp: June 11-13

Indianapolis Colts

First day: April 15

OTA offseason workouts: May 21-23, May 29-31

Mandatory minicamp: June 4-6

Jacksonville Jaguars

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31, June 3-6

Mandatory minicamp: June 10-12

Kansas City Chiefs

First day: April 15

OTA offseason workouts: May 20-22, May 28-30, June 4-7

Mandatory minicamp: June 11-13

Las Vegas Raiders

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31, June 3-6

Mandatory minicamp: June 11-13

Los Angeles Chargers

First day: April 2

Voluntary minicamp: April 22-24

OTA offseason workouts: May 20-21, May 23, May 29-31, June 4-7

Mandatory minicamp: June 11-13

Los Angeles Rams

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31, June 3-6

Mandatory minicamp: June 10-12

Miami Dolphins

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31

Mandatory minicamp: June 4-6

Minnesota Vikings

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31, June 10-13

Mandatory minicamp: June 4-6

New England Patriots

First day: April 8

Voluntary minicamp: April 23-24

OTA offseason workouts: May 20-21, May 23, May 29-31, June 3-4, June 6-7

Mandatory minicamp: June 11-13

New Orleans Saints

First day: April 15

OTA offseason workouts: May 21-23, May 28-30, June 3-6

Mandatory minicamp: June 11-13

New York Giants

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31, June 3-4, June 6-7

Mandatory minicamp: June 11-13

New York Jets

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31, June 3-4, June 6-7

Mandatory minicamp: June 11-13

Philadelphia Eagles

First day: April 15

OTA offseason workouts: May 20, May 22-23, May 28, May 30-31

Mandatory minicamp: June 4-6

Pittsburgh Steelers

First day: April 15

OTA offseason workouts: May 21-23, May 28-30, June 3-6

Mandatory minicamp: June 11-13

San Francisco 49ers

First day: April 15

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31

Mandatory minicamp: June 4-6

Seattle Seahawks

First day: April 8

Voluntary minicamp: April 22-24

OTA offseason workouts: May 20, May 22-23, May 28, May 30-31, June 3-4, June 6-7

Mandatory minicamp: June 11-13

Tampa Bay Buccaneers

First day: April 15

OTA offseason workouts: May 21-23, May 28-30, June 4-6

Mandatory minicamp: June 11-13

Tennessee Titans

First day: April 8

Voluntary minicamp: April 22-24

OTA offseason workouts: May 20-21, May 23, May 28-29, May 31, June 10-13

Mandatory minicamp: June 4-6

Washington Commanders

First day: April 2

Voluntary minicamp: April 22-24

OTA offseason workouts: May 14-15, May 17, May 21-22, May 24, June 4-5, June 7

Mandatory minicamp: June 11-13