On Monday, citing unnamed sources, ESPN Las Vegas reported Manziel dodged detection Saturday night by donning a blonde wig, a fake mustache, glasses and a hooded sweatshirt. He reportedly used the name "Billy" and stayed out partying past 3 a.m.

"I haven't seen Johnny and I'm not sure if those reports are accurate or not," owner Jimmy Haslam told ESPN after Manziel failed to show to his medical check Sunday. "We do expect a lot out of our players on and off the field, and I'll just leave it at that."

Manziel’s future with the team was not immediately clear.