My vote: Game 7 of the 2010 NBA Finals. The refs screwed us, which makes it even more painful...
The worst hose-job in that series came in game 3. classic David Stern. We had them on the ropes at home, the Lakers were in a visible panic, then the refs got pretty much our whole team in foul trouble. It was insane. But because the worst of it happened early in the game, people forget.
Pierce and KG with 5 fouls apiece. Vintage Rondo with 4, and Sheed with 4. Ray had just 2.
Bryant, Gasol, Artest, and Bynum, had 2 each. Odom had 4. And a lot of those Laker fouls came later, after the C's had been crippled in the first half.
Without that "David Stern Special," the series never makes it back to LA.
What a disgrace.