Paul Sellew was sitting courtside when the Celtics won the 2008 NBA Championship. The next day the Boston Globe ran a full page photo of the players hoisting the trophy, and there was Paul in the background. In this photo you can see Paul on the left side of the central photo. He is wearing a blue shirt and has a big smile on his face; his head is at the same height as the top of the trophy.
For your own copy of Paul's photo, check out this Framed Print: "Sweet 17" Celtics' 2008 NBA Championship.