You are offering them Ward or Godfrey. Jamar has about the equivalent worth. A ruckman who can't do anything other than "tap" is completely useless. Big ruckman aren't hard to find, they're damn near everywhere. Hell, they've already got one in the 211cm Street.
Big ruckman who can play are hard to come by, and they are worth something in trades. Unfortunately, Jamar isn't one of those.
McDougall's not a ruckman. He's a (useless) KPP player.