According to Mary Kay Cabot of the Plain Dealer, Manziel was at the team's facility on Saturday morning before being spotted in Las Vegas later that evening. However, Cabot noted the Browns "do not know if [Manziel] was in Vegas on Saturday."
However, the quarterback posted a picture to Instagram on Saturday night, adding Avon, Ohio, as the location of the picture.
Following a Week 17 defeat to the Pittsburgh Steelers, head coach Mike Pettine, when asked by reporters if Manziel was in Las Vegas, responded: "I don't know, I wasn't."
Peter King of MMQB.com added additional details regarding the team's policy on handling player's in the concussion protocol:
Browns require players in concussion protocol to be seen by team medic at 9 am on Sunday even if they’re not playing. Manziel didn’t show up Sunday. Browns couldn’t reach him on phone. At this point I can tell you Browns are so done with the guy. I will be stunned if he ever plays another snap for Cleveland. He wants to go to Dallas.
Manziel, 23, started six games and appeared in nine contests for the Cleveland Browns this season, throwing for 1,500 yards, seven touchdowns and five interceptions. However, he was ruled out of Sunday's season finale because of a concussion.
Manziel, who entered rehab last offseason to combat a drinking problem, was already benched this season after video surfaced of the quarterback partying in a club during the team's bye week. Manziel then lied about the incident both publicly and to Pettine, leading to his temporary demotion.
"It wasn't Coach Pettine's fault that I did what I did," Manziel said while commenting that he hoped Pettine had a future with the organization, per Cabot. "It was just on my end taking responsibility and there's no grudges, there's no hate or anything like that. He's our head coach and our leader, and I definitely have a respect for him and that's not going to change—no matter what."
Despite Manziel's defense of his coach, Cabot reported the organization is set to make sweeping changes this offseason in a "likely blow-up of [the] Browns regime."
And Manziel's own future may be called into question after he was reportedly spotted at a Las Vegas casino this weekend and was seen drinking on Christmas Eve in another video.