Isn't the MCL like 2-3 months? I know an acl is killer for a season. It would suck for that to be the case because with Memphis ownership, they may very well say screw it and trade Zach if its serious so they can develop the other two bigs for Marc's return.
As as for Rose I just think he's injury prone. Whatever he didnt do during that lockout to keep his body up has bit him in the ass. He only played. 39 games out of 66 with lower letter sprains and strains. Then he tore the acl and now he seemed to have hurt his other knee.