While the exact injury to McKinney wasn't disclosed, a low-level calf strain can take 2-3 weeks to heal. The Packers likely want McKinney, an All-Pro during his first season in Green Bay, to fully recover from a soft tissue injury before the start of the regular season.

Green Bay Packers All-Pro safety Xavier McKinney may not be back on the field until the team's game against the Detroit Lions in Week 1 of the regular season.

Green Bay Packers safety Xavier McKinney indicated his calf injury could sideline him the rest of training camp, telling reporters Thursday that he doesn't expect to play in the preseason but will be ready for Week 1.