Simplify the following text for a Grade 10 native English-speaking person.
Original: Peter Clay Carroll ( born September 15 , 1951 ) is the head coach and executive Vice-President of the Seattle Seahawks of the National Football League .
Simplified: Peter Clay Carroll ( born September 15 , 1951 , in San Francisco , California ) is the head coach and of the Seattle Seahawks , a National Football League team .