Green isn't expected to be fully recovered from a torn quadriceps tendon until the start of training camp in late July, though it's not a given the four-time Pro Bowler will be ready by then. He sustained the season-ending injury at Minnesota on Oct. 23.
Davenport also might not be back until training camp. He suffered a broken right ankle against New Orleans on Oct. 9.
Clifton is on the mend after undergoing knee and ankle surgery following the end of the season.
Brady Poppinga, a candidate to fill the starting vacancy at strong-side linebacker, continues to rehabilitate from late-season surgery for a torn anterior cruciate ligament in his left knee. He's expected to return to the field some time during training camp.
The Packers will conduct their second off-season mini-camp May 19-21 in Green Bay. None of the aforementioned players are expected to participate in team drills.