Minkah Fitzpatrick
The Dolphins made Fitzpatrick a first-round pick in 2018 and he stayed in Florida for two seasons. But he felt the franchise was going backward and Miami needed a rebuild. Pittsburgh leaped at the chance to sign the safety and made one of the biggest trades of the past decade (via Sports Illustrated).

It was a great decision because Fitzpatrick displayed Pro Bowl form and even had one of the longest pick-sixes in history. Miami usually doesn’t give up first-rounders without a fight but they saw the sense this time. Pittsburgh assembled one of the best defenses in the league by adding him to their roster.