According to ESPN, Jackson is expected to miss an extended period of time with an injury to his lower leg during practice on Monday. Campbell was very short with his update about the rookie safety. "It doesn't look good,

Lions head coach Dan Campbell on Monday updated the injury statuses of safety Dan Jackson (leg) and cornerback Ennis Rakestraw Jr. (shoulder).

The Lions have placed seventh-round rookie safety Dan Jackson on injured reserve and signed Michigan Panthers CB D.J. Miller