BEREA, Ohio — Baker Mayfield reported to Cleveland Browns training camp in July sporting a mustache. And because he is Baker Mayfield, and because he plays quarterback well — a phenomenon largely alien to these parts — he was asked after a recent practice about the provenance of that mustache. Sorry, he said, no can do.

“That’s the elegance of having a mustache,” Mayfield said. “You just don’t know what’s going to happen.”

The possibilities are boundless for this team. Beyond Mayfield, who is as likely to stare down his former coach after a long completion as he is to bite into a can and shotgun a beer at an Indians game, the Browns pilfered the provocative receiver Odell Beckham Jr. from the Giants, adding him to a roster so laden with premium talent and flair that cameras should trail them all season.

Oh, wait.

That kinda sorta happened last summer, when the HBO sports documentary series “Hard Knocks” alighted upon Browns headquarters. The show introduced the public to Mayfield’s quarterbacks-only R.V. and the former defensive end Carl Nassib’s financial literacy, but it also exposed signs of the internal discord that triggered a midseason coaching purge.