After trading their unprotected 2031 first-round pick and either a 2028 pick or a swap to the Celtics for Brown, the Sixers can only trade these first-rounders or swaps: Since they owe their 2031 first-rounder to Boston, they can’t trade their 2030 or 2032 picks outright unless they acquire another pick from another team in either of those years. 2029 Sixers pick