Posted by ESPN.com's Kevin Seifert
As we await an evening practice in Minnesota, here's an uh-oh moment from Detroit: The Lions placed nose tackle Grady Jackson and receiver Bryant Johnson on the non-football injury (NFL). Neither will be available to practice during the early portion of training camp.
Jackson has an undisclosed illness, according to Tom Kowalski of Mlive.com. Johnson has an injury not related to football.
General manager Martin Mayhew said both players would be added to the active roster "soon." But the news is a bit disconcerting as it relates to Jackson, who missed the Lions' offseason practices after undergoing knee surgery in November. Jackson, 36, played in 15 games last season for Atlanta but has a history of injuries. The Lions are counting on him to play a big role in improving their horrendous run defense.
It's not unusual for an older veteran to miss offseason practices. (And let's face it: When Jackson entered the league in 1997, there were no such thing as organized team activities.) And the first few days of training camp are important, although hardly mandatory. But at some point the Lions are going to need to get Jackson on the field for conditioning, continuity and evaluation purposes.