As the OP says
Reina, Enrique, Johnson, Agger, Skrtel, Lucas, Allen, Gerrard, Downing, Suarez, Borini.
So from the other perspective, assuming we have a full strength line up out unless we make more signings, then the following are available for selection for a place on the bench for our first game...
Doni, Jones, Carragher, Coates, Kelly, Flanagan, Robinson, Adam, Henderson, Shelvey, J Cole, Spearing, Sterling, Carroll.
I might be missing a couple, but while the first team is clearly strong as it is, there will be injuries during any season and I would agree with Rodgers that we could do with a couple of additions to those players who are that bit better and on the fringes of competiting for a first team place, which is currently IMO, Henderson, Shelvey, Sterling and Carroll if he stays as the rest of the list are either a little too inexperienced or perhaps a little past their best?
Without wanting to turn it into a transfer thread, when you look at the players available in terms of our bench, I personally can see exactly why we might benefit from that bit of extra quality in the final 3rd which could be called upon to change a game- and we simply cannot be turning our noses up at a player of Dempsey's standard if we can get him in for the right price- I think we still need a couple of game changers for the bench, as looking at that list, we're relying on Cole, Sterling, Carroll and at a push Shelvey further up the pitch, to change a game or offer us a different strategy. With Sterling being very very young, and Cole perhaps a little out of his depth at this level (despite a good season at Lille?).
We look very light up front as well, are we not purchasing another striker?