Michael Irvin has been 86'd from speaking at a high school awards event in Arkansas -- after event organizers learned the NFL legend is being investigated for sexual assault.
Irvin was set to be the keynote speaker at the Best of River Valley Preps All-Stars Awards on June 1 -- an event that honors the top high school athletes in Arkansas and Oklahoma.
TMZ Sports spoke with Jason Taylor -- the president of the organization behind the awards -- who tells us Irvin's investigation causes a "conflict and distraction."
Taylor says organizers understand the situation is still being investigated -- and they don't presume guilt -- but, "We don't want to take away from this special night of recognition."
We're told Irvin's team was understanding.
A replacement speaker has yet to be named.