You too are entitled to your opinion.
In general I'm skeptical about the media but Schefter has been working the NFL for 30 years and has been employed by ESPN (again, not a fan) for 10+ and if media reports are accurate makes over $1 million per year...
...surely he must occasionally get good information.
As for "unidentified sources"...their status as on-going sources 100% hinges on Schefter not identifying them...suggesting the info is no good just because the source is "unidentified" is not logical in any way.
Again, you're entitled to your opinion, but what rationale do you suggest would motivate Schefter to just make that up and put it into the space?