Mitchell Robinson's dad is missing ... and the New York Knicks center is asking everyone for help finding him.
Robinson -- who was drafted in the second round by the Knicks in 2018 -- expressed concern on social media ... saying his dad, Mitchell Robinson Jr., has been MIA since Feb 13.
"My dad is missing if you have info on his whereabouts please contact 850-436-9620," the number for the Escambia County Sheriff's Dept., Mitchell wrote.
Days later, Robinson once again took to social media .