In addition to the valid points already made - that Losman over Bledsoe is a huge improvement and JMac should have even more success in his second year after a successful first season - I don't think there is a guard in the history of the NFL that is worth three wins to a team. So if you want to get to 12-4, one free agent guard, any free agent guard won't get you there. It might get you one win, tops. And IMHO, McGahee healthy for a whole season and even better, as he says he will be, plus Losman's mobility, should be enough to win those at least three of the 4 close losses (3 early games we lost by 8 points and the season finale), and there's your 12-4.