That’s not the whole story by a long shot. Any fair evaluation of this trade has to include the previous exchange where the Dolphins traded back from the 48th overall pick in the second round to the 62nd.
That’s because the Dolphins made that trade to set up the final deal for Rosen. Here’s how the trade breaks down assuming, as is the common wisdom, that future picks are worth a pick in the current year minus one round:
Add all of that up and here’s what that means. After all is said and sifted, the Dolphins got a top ten pick from 2018 and a potential starter for trading back to the third round and giving a fourth round pick.