Cochrane, a summer signing from Crewe Alexandra played a couple of the Millers pre-season games but then required surgery on a knee problem anhas been out since.
However, both players will restart full training from next week.
Knill told todays Rotherham Star: "It's important Justin comes back at the right time, It is encouraging that his recovery is coming along nicely and it was good to see him running again and then stepping up his training."
However defender Colin Murdock its taking it easy after going under the knife last week to cure a hernia problem. The clubs official site stating that he will be back at Hooton Lodge next week but will be restricted to just jogging.