Lee didn't have a very good first game, but the second preseason game was very solid for him.

Lee shows potential in Milan - Boston Celtics Blog - ESPN Boston

Even though he came off the bench on Sunday and played fewer minutes with the starters, Lee still looked far more at ease within Boston's sets, attacking the rim consistently, and showing off the athleticism that will allow head coach Doc Rivers to utilize him in multiple scenarios this season. Rivers said after the game that the lineup change -- Jason Terry and Jared Sullinger replacing Lee and Brandon Bass, respectively, in the starting lineup -- was a product of it being preseason and nothing else.

Doc can say what he wants, but I reserve the right to read way too much into who he starts in any given preseason game. That's part of the fun.