Johnny Manziel's sports agent: 'I'm gravely concerned'

Agent to Manziel: Get help
Agent to Manziel: Get help

Johnny Football may have reached rock bottom.

The 23-year old former Heisman winner finds himself unemployed, without sponsorships, and maybe without representation. Famed sports agent Drew Rosenhaus told CNBC's "Squawk Alley" on Thursday that Manziel has five days to get treatment — or he will no longer represent him.

"I'm gravely concerned about this young man," he said. "I am not going to stand by and watch him ruin it all."

Johnny Manziel #2 of the Cleveland Browns walks off of the field after being defeated by the Cincinnati Bengals 31-10 at Paul Brown Stadium on November 5, 2015 in Cincinnati, Ohio.
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If Manziel does not comply, Rosenhaus will become the quarterback's second agent to call it quits. In February, SSG's Erik Burkhardt cut ties with the former Aggies star after an alleged domestic violence incident. That case has been sent to a Dallas grand jury, where Manziel could face charges of misdemeanor assault.

On Friday, USA Today reported that a Los Angeles property owner is alleging that Manziel and friends caused thousands of dollars in damage to a home he rented earlier this month.

Since being released by the Browns in March, Manziel has been in the spotlight for all the wrong reasons. From partying in various cities around the country to allegedly being a passenger in a hit-and-run accident, it has been one bad headline after another.

Longtime agent Rosenhaus said he's never had to fire a client, and he's represented hundreds of athletes. He believes if Manziel gets the help he needs, he could be a top quarterback: "He has a potentially brilliant future."

"I see a 23-year-old young man who needs to get control of his life, which is more important than football," he said.