The Yabu playing time is really interesting.
I think Brad saw the overreaction coming by the refs to protect Giannis tonight, so he figured why not play Yabu off the bench and give us six extra fouls to spare against him. And while Yabu is no Horford, Brown, or Morris guarding Giannis, he has both the quickness and the size/strength to bang with him, so you could always do worse.