haohmaru
boomshakalaka
The way I took it was he heard it from a source who isn't in the business of breaking news or sharing rumors. He rated his source as a 9 on a scale of 1-10 on how high up/trustworthy they are. Since he's broken news on the Rangers in the past with moves they've made, I'm gonna take it as it's someone that's really high up in the Rangers organization.
That would make a lot of sense esp. about him not discussing specifics.