Brooklyn Nets for Kevin Garnett & Paul Pierce (2013)

The Brooklyn Nets traded their entire future for aging stars Kevin Garnett and Paul Pierce in 2013, gifting Boston the draft picks that became Jayson Tatum and Jaylen Brown. Brooklyn received just two playoff wins from the duo, while Boston built a perennial contender — a 50-win team for six seasons. This deal is 40% more costly in draft capital than the average NBA trade, as it surrendered three first-round picks. It places behind #2 in total value lost but ahead of #3 in modern relevance, reshaping two franchises.