If he's the AD, he has the power to fire Oscar now. The body of work is there for all to see. None of us had to give Oscar 5 years to figure out if he could do the job. All we had to do was look at his record at the place that had just fired his ass.
BITB and Stanbot are convinced that ADGT just has to take Oscar aside and ask him, "What do I need to do to help you improve the talent level at KState?" The answer to that question is simple. Oscar will say, "I don't want to get my hands even a little dirty bringing in Jacob Pullen-type kids."
So, ADGT will easily know right away to fire Oscar.