I think he'll play a lot of minutes in the playoffs for the Celtics. Assuming JO is injured and unavailable, I see Murphy taking minutes primarily from Kristic, BBD, and a bit of Shaq's too. I really like what he can bring to this team, and am confident that his defense will become serviceable by the time the post season starts.
I know we love our players, but I believe people are understimating how valuable a guy like Murphy can be on the court.. especially on a team like the Celtics which has great spacing & passing.