A field stretcher implies someone fast. So another Jalen Reagor? Another Dan Chisena? Sure, you can find upgrades from those guys, but if so, you're talking about someone who's probably a starter right now, and that won't come cheap, neither in trade terms or salary. And then who does he replace in 3 WR sets? Thielen? KJO?
I'm sure KOC knows what he needs for his offense, but it just seems like the wrong road to go down when another pass rusher or defensive back would have more impact. JMO.