McRoberts would be a good compliment to a top flight center.
We don't have a top flight center.
Mullens would be a good back-up to a good starting power forward.
We don't have a good starting power forward.
That said, it's easy to forget how well Mullens was playing early last season. He was our only scoring big and he was rebounding well. That Mullens never seemed to come back. I might take that guy over McBob if I believed he would play that way consistently.