Simplify the following text for a Grade 6 native English-speaking person.
Original: Art Pepper ( September 1 , 1925 â `` June 15 , 1982 ) , born Arthur Edward Pepper , Jr. , was an American alto saxophonist and clarinetist .
Simplified: Arthur Edward `` Art '' Pepper , Jr. ( September 1 , 1925 â `` June 15 , 1982 ) was an American jazz alto saxophonist .