When the Kansas City Chiefs traded for cornerback Kendall Fuller from the Washington Redskins in the Alex Smith deal, the upside was his youth and tremendous performance in the slot in 2017. The growth from his rookie year was significant, and it was clear from the response on both sides of the trade that Fuller was appreciated by all.
There wasn’t really any downside to the deal at all, but if there was a concern, at least, it was that Fuller played inside for Washington in the slot. That was the same position mostly occupied by Steven Nelson for the Chiefs.