VP Danny Ainge knows how to draft young players, and he's done an exceptional job at it. But the record shows that he doesn't apply the same investigatory work to scouting the more than 400 players in the NBA. The Celtics are vulnerable on trades for existing NBA players because they don't do their homework. While they are exceptional at seeking out the minute details of 19-year-old college sophomores, the Celtics -- unlike most of their rivals -- don't have a pro personnel scout traveling the league and collecting behind-the-scenes information on veterans who may be traded to Boston. Rival teams are fully aware that Boston is vulnerable on trades for NBA talent, but the Celtics have yet to address this weakness in their front office.