We can add this as another reason.
From Eric Baranczyk
"We saw Thursday night why Aaron Rodgers and the coaching staff don’t have full trust in second-year receiver Jeff Janis. In the first quarter Janis got behind cornerback Nevin Lawson on a go route and Rodgers tried to hit him. But Janis drifted on his route and then slowed slightly as the ball was coming down, so he couldn’t quite catch up to the throw. Rodgers had correctly thrown the ball to Janis’ outside shoulder because Nevin had inside leverage, but Janis still drifted toward the middle of the field rather than anticipating the throw to the outside, and by the time he tracked the ball it was out of reach."
Originally Posted by: Zero2Cool