For me it would be former Boston Celtics center Greg Kite from the mid and late 1980s. Who was a solid backup center as far as rebounding and post defense. But this isn’t the list of worst players to ever play in the NBA, but to win the NBA Championship. And for me at least off the top of my head Greg Kite was the Celtics third-string center at this point. Because he was basically no offensive threat at all who had no outside shot. And even had trouble making shots close to the basket when he was open and got a pass from Larry Bird or someone. Who even had trouble putting offensive rebounds back in the basket as well. Who was a third-string center so that alone says a lot.
The list of the players that the people on this show listed, are perhaps the worst players to win an NBA championship in the last fourteen years, or since 2000. And perhaps that is because their knowledge of NBA basketball only goes back that far. But the NBA Finals has been around since 1948 or so. So their list isn’t very deep.