Is Mike Walker the odd man out?

We know Holt is a lock.

Troy Williamson looks great.

Jarret Dillard looks like he can be very special once he gets the jitters out.

Nate Hughes looks like he is ready to move off the PS.

I know Mike Thomas hasn't played but I think he is too much of a Playmaker to let go.

Tiquan Underwood shows great hands and deep speed.

So where does the oft-injured Mike Walker fit? He seems to get injured after every snap. Aside from that Steeler's game I can't think of much he has done. And he's been here since what 2007? Maybe its time to move on if he can't stay healthy.