Here's the problem:
The smart play there is saying something like
"There was a story about the footballs. I called multiple sources in the NFL offices, and they lied to me. That's the really story here: Multiple people in the NFL offices deliberately lied to me about the PSI of the footballs. I got burned by sources I thought I could trust. I won't out any sources, ever, but I'll never use those sources again, and I regret that I was used in this matter."
But that's probably something ESPN wanted no part of, given how close they are to the NFL, and they probably instructed Mort to go the other way with this. I know that I'm speculating, but that's really the only thing that makes any sense here.