As undrafted rookie Kendall Hinton heads into his unlikely NFL debut against the Saints on Sunday, count his high school coach as one who’s betting on the Broncos’ emergency quarterback. After all, Hinton’s spent all but one season of his football career playing quarterback. He starred at the position at Southern Durham (N.C.) High School while leading the Spartans to the program’s first state championship as a junior. “He’s prepared for this moment,” said Southern Durham head coach Darius Robinson.