"We believe if we don't make a trade we can win the championship. Our improvement has come from within - our young guys have played another year and are better. They are clearly better players than last year."
As for O'Bryant, the only newcomer currently with the Celtics, Rivers said, "He's just not ready yet. He's working on it, and he's making improvement. He's very young and it takes time. That's why I push him."