Three and a half months after wrapping up a disastrous 5-11 regular season that cost head coach Marc Trestman and general manager Phil Emery their jobs, the Chicago Bears officially kick off their voluntary 2015 nine-week offseason program April 13.

Per the NFL collective bargaining agreement, Phase One of NFL offseason programs (the first two weeks) are limited to strength and conditioning and physical rehabilitation only.

In the following three weeks (Phase Two), players are only to participate in individual on-field drills, but live contact or offense vs. defense team drills is prohibited.

The final four weeks of the voluntary offseason program (Phase Three) are when teams are allowed to conduct a total of 10 organized team activities in which players can participate in non-contact 7-on-7, 9-on-7, and 11-on-11 team drills.

The Bears are scheduled to hold OTA offseason workouts May 27-29, June 1-3, and June 8-11.

The club will have a voluntary minicamp April 28-30.

The annual mandatory minicamp takes place June 16-18 before the team breaks until the beginning of training camp in late July.