Dubas said and I quote "in order to keep Kerfoot, we had to expose McCann".
Kracken weren't taking Holl, they were going to take Kerfoot.
All this "had to protect Holl" is complete bullshit started by some poster earlier on in the thread.
you need to re-listen to what was said.
the conversation was started with the one assistant talking about protecting the top-4 dmen, and everyone agreeing that it was always going to be 4+4 protected, not 7+3.
Then Shanahan states that they could trade Hallander for McCann, and essentially keep Kerfoot for the price of Hallander, as Seattle would obviously choose McCann (and if they chose kerfoot, then the leafs would happily keep mccann).