Two players who might be the main beneficiaries of the attention Greg Jennings usually gets from Aaron Rodgers are Jermichael Finley and Randall Cobb. Finley can line up as a receiver - and often does - and it's likely McCarthy will run a few more plays in which Finley is the primary receiver.
Cobb has the best slot receiver skills among the group that will play Sunday and may earn a good portion of the opportunities Jennings usually gets to occupy the middle of the field. Cobb has been getting more and more snaps and this might be the closest he comes to being a starter this year.
This is just speculation from a beat writer, but it does seem logical that Finley would be the de facto WR1 for the Packers with Jennings sidelined. Jordy Nelson would remain in the WR2 role, so the question is who will see WR3 targets from Rodgers on Sunday -- Jones, Cobb or Driver? It depends largely on what the Chiefs do defensively, but we have to believe that this was the reason the Packers re-signed James Jones.