Jackson left Sunday’s practice to be evaluated for a leg injury. Now, the seventh-round pick is headed to injured reserve. Jacob Hamilton | MLive.com By Benjamin Raven | braven@mlive.com ALLEN PARK — The Detroit Lions have placed rookie safety Dan Jackson on the injured reserve list. Jackson, the team’s seventh-round pick, left Sunday’s practice to be evaluated for a leg injury. He played 36 defensive snaps and 13 on special teams in the Hall of Fame Game loss last Thursday. It is not clear what happened with Jackson, but head coach Dan Campbell is expected to address reporters before Monday’s night practice. Latest Detroit Lions news: 49ers sign former Lions defensive lineman, release ex-kicker