I don't get why a solid trainer wouldn't lock himself on to Russell with a contract with nothing up front but a percentage when signs a deal.
There is absolutely no reason why he shouldn't be on an NFL roster at the minimum. His work ethic must be atrocious, and he basically must have just given up on ever being productive forever.
If someone cooked his meals for him, and worked him out they would get paid.
If he's broke, that would be a good deal. If he still has money left, no way I'd trust him to ever get motivated at this point.