The Krstic injury is a non factor. He was a terrible player and was a trainwreck on defense, his stats also were bad and he brought no intangibles to the team.
Anyone from the D-League can fill in at his playoff role as 3rd string center.
Baby/KG can play minutes at center if needed also.
I repeat again, Krstic was a scrub that brought nothing to the table, no defense, no toughness, nothing.