I lost Zach Lee at LSU the same way.
Week 3 in year 3 of my Dynasty he gets hurt in his Sophmore year. He was the starter in the first three games.
I did not move him down the depth chart. I got him back for the SECCG.
He started and I won and then went on to the BCS NCG and he started and I won the MNC.
At the end of the season he wanted to transfer and I could not prevent it.