In the recording of Bracken that Montgomery left for Beckett, the conversation is exclusively between Montgomery and Bracken. But as established in Knockout (2011), Montgomery was only a rookie during the Joe Pulgatti/Bob Armen incident; it seems unlikely that two veterans like Raglan and McCallister would choose a new guy to speak for them, especially to the ADA who's been blackmailing them about the crime for which he not only has the ability to prosecute them at any time he chooses, but is heard saying outright he's more than willing to do so.