According to a source, Janis sustained a fracture to at least one of the bones in his right hand.
Janis did not play in Friday's preseason game against the Cleveland Browns and was not seen on the sidelines during the game or in the locker room afterward.
Following Wednesday's practice, Janis came into the locker room with a large ice pack wrapped around his right hand. He said his hand "got a little jammed up" during one of the ball-security drills. Janis was running with the first team in practice with Jordy Nelson and Ty Montgomery already out of action.