Simplify the following text for a Grade 10 native English-speaking person.
Original: Benjamin S. `` Ben '' Carson , Sr. , M.D. ( born September 18 , 1951 ) is an American neurosurgeon and the Director of Pediatric Neurosurgery at Johns Hopkins Hospital .
Simplified: Benjamin S. `` Ben '' Carson , Sr ( born September 18 , 1951 ) is an American neurosurgeon .