Orlando L. Serrell (born 1968) is an "acquired savant" — someone who exhibits savant skills after CNS injury or disease, as opposed to a person born with autistic disorder or other developmental disability.
Orlando Serrell did not possess any special skills until he was struck by a baseball on the left side of his head on August 17, 1979 when he was ten years old. Serrell fell to the ground, but eventually got up and continued playing baseball. He did not get any medical treatment because he did not tell his parents; for a long while, he suffered from a headache. Eventually, the headache ended, but Orlando soon noticed he had the ability to perform calendrical calculations of amazing complexity. He can also recall the weather, as well as (to a varying degree) where he was and what he has done for every day since the accident.
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