The proof is in Buster Olney's recent tweet: NYY are not interested in signing Holliday. They'll talk to Boras to keep other bidders honest, but corner outfield not a priority for them.
Presumably Buster is writing this based on information he received from a source in the Yankee organization. Or he's going rogue and offering his interpretation of the Yanks' offseason plan. In other words, this claim, offered without the least bit of qualification ("I think the Yanks are not interested…." "Team officials tell me they're not interested in Holliday but are interested in using me to further their agenda…"), is dubious, or more precisely, worthless. Still, these are words strung together which actually serve a purpose for this site, and that is to move your eyes from below this post to this post. Mission accomplished Buster!