The injuries weren't limited to the backfield.
Tight end Jermichael Finley was concussed in the first quarter. Pass rusher Clay Matthews was forced out with a hamstring injury after forcing fumbles on back-to-back Bengals possessions in the second quarter. Andy Dalton exploited his absence, tossing two second-half touchdowns after Green Bay's 30-0 run in the second and third quarters.
Matthews predicted after the game that he won't miss any game action with the injury. It's a good bet that Lacy, Franklin and Finley will be back by Week 5 as well.
Here are the rest of the injury updates from around the NFL: