This is pretty much our senior squad plus an odd appearance from guys like El Zahr:-
GK Reina, Cavalieri
LB Insua, Aurelio
CH Carragher, Agger, Skrtel, Kyrgiakos
RB Johnson, Degen
LM Benayoun, Babel, Riera
CM Mascherano, Lucas, Aquilani
RM Kuyt, Maxi
F Gerrard, Torres, Ngog
I've put Stevie and Yossi in the positions that they've mainly played this season. It's a thin squad even before losing Degen, Aurelio and Aquilani to injury for much of this season and so we couldn't afford Rafa's stance on Riera.
It's difficult to keep track of why it became so thin but I think Sheiky's right, we've sold more than we bought. In the last two Winter transfer windows, we let Keane, Voronin and Dossena go and only brought in Maxi.
Also, I suspect that recent salary increases for the likes of Reina, Kuyt, Agger, Torres, Stevie and Mascher has meant the first team has gotten a larger slice of the salary pie and so there's less, if any, for filling out the squad.