You can get good players in Rounds 4-7 and through undrafted (especially the possession types). Instead of paying 42 million for a mediocre WR.
that's a great solution if you're a team with decent wide receivers and you just want to replenish and make sure you have depth, the redskins have nothing- if they bring back the elderly and run a few late round picks out there, it won't go over well
