I remember that story, and I totally believe it.
Sal was doing the job that a friend of mine used to do for the Bills.
It was the era before wireless headsets on the sidelines, so they needed a guy to "manage" the hard wired coach's headphones, to keep people from tripping over the lines or standing on the lines, so the HC could move freely on the sidelines.
Not a glamorous job. No reason for embellishment. And the only possible way I'd know this was that Sal included it in his posts, since I've never met him personally.
I remember him telling a story about how Plaxico Burress was either deaf or thick as a brick, and kept standing on the cord.
I remember the Mularkey story, too. Sal was giddy, like a little kid, and portrayed it that way. He wasn't acting like he was all cool and ran with the Bills coaching crew. He presented it as a once in a lifetime encounter at a postgame party.
I don't know anything about what he did in FLA, but I do remember the sideline story, and it rang 100% true. It wasn't as you characterize it.