I've been saying that for years on Rotoworld and getting killed for it.
But that has nothing to do with my post. Belichick always takes smart gambles on bargain-basement players. That's his strength in the personnel department.
If your league stops transactions during the playoffs, you need 2 on your playoff roster because of injury. And with TE a wasteland, now is not the time to drop a decent TE like Rudolph, Njoku, Vance McDonald.