Campbell adds clarity to Kerby Joseph's injury situation.
Joseph, Branch and Tyler Conklin will miss a minimum of four games if they remain on the PUP list at the start of the regular season.
Branch, Joseph will both begin training camp on PUP list when camp begins.
Detroit Lions safety Kerby Joseph addresses previous social media posts.
Detroit Lions safety provides additional updates on social media about playing future.
While Gibbs sits out practice, Kerby Joseph keeps working back from a nagging knee injury, and Jamison Williams is flashing his confidence.
Dr. Jimmy Liao provides in-depth opinion of Kerby Joseph's knee injury, Sam Laporta's back injury.
