Patrick Peterson (21), Michael Floyd (15) and the rest of the Cardinals can start the voluntary strength and conditioning program on April 20.

Construction continues around the Cardinals' Tempe complex as the new weight room and locker room – among other details – are built for the 2015 roster. The players in the meantime will do their work in the team's practice bubble, and soon, that will mean a lot of players.

The Cardinals announced their offseason dates on Tuesday, including one that was not a secret at all – April 20,

when the strength and conditioning program can begin according to the collective bargaining agreement. They are voluntary workouts, although some players have bonus money tied to their participation.

A look at most of the key offseason dates:

-- Only strength and conditioning coaches allowed on the April 20 date.

-- The draft is April 30-May 2, with the team draft party held out at University of Phoenix Stadium April 30.

-- Players allowed on-field football work with coaching (no helmets, no contact, no offense vs. defense) May 4.

-- Rookie minicamp May 8-10.

-- OTAs run from May 19-21, May 26-28, June 1-4. Helmets allowed, as is offense vs. defense.

-- Minicamp June 9-11.

After minicamp, the coaches and players will scatter for time off before training camp and the beginning of the 2015 season. The lone mandatory function for veterans is the final minicamp.

The annual charity golf tournament with the team will be held April 23 at Whirlwind Golf Club.

The draftees will also take part in the Rookie Symposium in Ohio in late June.