If Brees gets a 3 year extension do we really need 3 QB's on the roster?

It's McCown who hasn't impressed me, from what I've seen. When the numbers of the two players are comparable, I've got to look at the experience of both players, and the cost of each. For having as much more experience over GG as McCown does, and the cost of his contract, I think I'd give the nod to Grayson before I do McCown.