The Rockets have officially signed Pops Mensah-Bonsu.  That gives us Pops, Scola, Landry, Hayes, Cook, Dorsey, who are all interchangeable at their position.  Who's expendable/tradeable?  Who would we trade for?  I can see Cook as expendable, but not tradeable, and as much as i love Chuck Hayes' game, we really need more size with the absence of Yao.  Dorsey has come a long way, but still has a long way to go.  So with all this depth at  the position, who stays who goes and who gets minutes?  Comments?