Atlanta Falcons defensive end Takkarist McKinley was detained by police in L.A. on Tuesday and is undergoing a mental evaluation following an incident at a hotel ... TMZ Sports has learned.
McKinley was with a friend at a high-end hotel around noon when something happened and the friend became concerned about McKinley's well-being. We're told the friend called police for help.
We're told cops spoke with McKinley who agreed it was in his best interest to get help -- and he cooperated and left with police. We're told McKinley was NOT arrested or booked for any crime.