10:10 AM PT -- Law enforcement tells us Incognito was placed in an involuntary psychiatric hold to be evaluated. It's essentially the equivalent of a 5150 in California. It's technically not an arrest -- but a forced mental evaluation.
It's not the first time Incognito has been placed on an involuntary psych hold -- the same thing happened a few years ago in the wake of the Jonathan Martin bullying scandal.
Richie Incognito was involved in an altercation with another man at an upscale Florida gym -- with the alleged victim claiming Incognito threw a dumbbell at him .