When did it become cool to sound ignorant or stupid? I hear this all the time... "I don't know who he/she is" when not only did someone post a video of it but the TITLE says that its a male.
I hope for your sake you're trolling, Coach. Otherwise... 
The sad thing is that he's not trolling.
The 'Coach' has now taken over from Melvin Goodrum as the most *unaware person in the history of GetBig.
Post after post of hilarity in combination with total & utter unawareness of fact, science or common sense.
*un·a·ware
adjective: unaware
1.
having no knowledge of a situation or fact.
"they were unaware of his absence"
synonyms: ignorant, unknowing, unconscious, heedless, unmindful, oblivious, incognizant, unsuspecting, uninformed, unenlightened, unwitting, innocent; More
inattentive, unobservant, unperceptive, blind;
informalin the dark;
literarynescient
"the vice president claimed to be unaware of the arms deal"
antonyms: conscious