I think coach realizes what he has in Cassel. I come up with this thought because he said, " we know what we have in Cassel" I also believe he wants Cassel as our # 2 and would like EJ or TT to have the chance to prove who is the #1 and the #3. Simple as that.
I had to look it up. The meaning is expressing a lack of interest or enthusiasm. This basically means the OP doesn't like or care for Cassel so this is his real reason for the Post.