Celtics playing the pick 3

The Celtics essentially have 3 open roster spots to play with this summer.  They've got $5.6 million in mid-level money to play with... assuming they spend the whole thing.  So let's start looking at ways to get 3 guys in here who can fill the voids we have.  I'm trying to use realistic salary expectations.Stephon Marbury: $2.5 milionMatt Barnes: $1.5 millionIke Diogu: $1 millionThis scenario keeps Marbury in town to back up Rondo, gives us a back up for Pierce, and gives us a serviceable power forward.  Barnes would be able to score a little... and if both are running with Steph... maybe he'll opening things up for both to perform slightly above their averages.Charlie Villanueva: $4 millionRoyal Ivey: 884,881 (minimum)James Singleton: 884,881 (minimum)This is called "desperately trying to get 3 guys while signing Villanueva".  It is admittedly trying to stretch things.  But Ivey could be a decent back up option at the point and Singleton could at least spe...