By TODD McMAHON/Associated Press GREEN BAY, Wis. (AP/CBSSports) -Lions wide receiver Calvin Johnson was unable to get through pregame warm-ups Sunday, and is officially inactive for Week 5 against the Packers. Johnson was bothered by a knee injury throughout the week. Ask Darren Perry about Calvin Johnson and the Green Bay Packers safeties coach cuts right to the chase. Hes pretty doggone good and he can create some problems in a lot of different areas, a smiling Perry said of the standout Lions wide receiver. So we have to account for him. Perry said the Packers defense, which has given up a lot of passing yards already this season, will have its hands full against one of the NFLs more prolific passing attacks. He is hopeful the return of safety Morgan Burnett can make a difference Sunday when the Packers host Johnson, quarterback Matthew Stafford and the rest of the Detroit Lions. Burnetts belated season debut after missing Green Bays first three games because of a hamstrin...