Re: Celtics 2013 Roster
Lee is a SG not a PG. He has played some SF successfully in his career.
Joseph is also non-guaranteed. They also have Jamar Smith as a training camp invitee (non-guaranteed).
The Celtics have 13 players guaranteed to be on the roster. One of Christmas and Joseph will probably be the 14th, and the Celtics will leave the 15th and final spot open for a mid-season signing after buyouts.