Think of how 5 2nd round picks went to the Suns as part of the trade package for Durant.
Second round picks are being used quite a bit as assets in trades. Remember, the Celtics picked up 2 as part of the Simons trade and 1 more as part of the Zinger trade.
That's 6 2nd rounders they've accumulated. I wonder if they will be used to grease the wheels in another trade.
Remember too the Celtics have most their own 1st rounders as well.