Johnny Manziel

While the Cleveland Browns disputed a report Tuesday that they had “lied” about Johnny Manziel’s concussion symptoms prior to the season finale to cover for the quarterback reportedly showing up drunk to a team meeting that week, one well-placed Browns source who had contact with Manziel that day told ESPN’s Adam Schefter that he “was heavily hung over on something.”

An independent neurologist diagnosed Manziel with a concussion four days before the 2015 season finale, the Browns said Tuesday. Manziel was not cleared from concussion protocol by the independent doctor until Jan. 12, according to a team statement.

“Johnny Manziel came to our facility on the morning of December 30th and complained of concussion symptoms,” a statement released by the team said. “He was tested by an independent neurologist and entered the league’s concussion protocol. He remained in the protocol until January 12th after being cleared by the independent neurologist.”

Manziel missed the finale because of the concussion, but was reported to be in Las Vegas that weekend — much to the Browns’ surprise. He missed a scheduled assessment Jan. 3.

One well-placed Browns source who had contact with Manziel on Dec. 30 told Schefter: “Manziel looked terrible. He wasn’t drunk, but he was heavily hung over on something. There was something going on there.”

Manziel complained that he was having trouble with light, was vomiting and had a headache.

“This wasn’t some massive cover-up,” the source told Schefter. “What are you going to do? You have to put him in the protocol.

“… He was not drunk that day, but he was [recovering] from being on something. I don’t know what he was doing the night before, but something was wrong with him.”

Manziel was hit in the head twice in a 17-13 loss to the Kansas City Chiefs on Dec. 27. Linebacker Josh Mauga hit him helmet-to-helmet at the end of a scramble, and Manziel’s head hit the turf after he was tackled by Allen Bailey on another fourth-quarter run.

“People should be very cautious about suggesting medical personnel would deliberately falsify a diagnosis,” the source said, “particularly when a player’s subjective report of symptoms is involved in making that diagnosis.

“Imagine if a player complained of symptoms and the medical staff didn’t place him in the protocol? Imagine how lambasted they would be. Medical care of any kind is predicated on a patient being truthful.”