Underhill and Triplet both built up sources while they were both working for other outlets. I think those sources carried over when they when they branched out on their own. An entirely new coaching staff this year and slow changes to the roster have probably eliminated most of their direct connections.
As negative as they've been about the Saints for the past couple of months, I doubt the new regime is going to share anything with either of them that they could negatively spin. I have a feeling that they are both going to be on the outside looking in a lot more from now on.
Also, players don't have complete information on most of team business, so a single player isn't the best source of information. I don't get the impression that any sports reporter looks for multiple corroborating sources before they post things on the internet.