Original sentence: Sanders is best known for being among the most prolific running backs in NFL history who cut his career short in its prime, leaving him just short of Walter Payton's all-time rushing record (which has been since broken by Emmitt Smith)
Edited sentence: Sanders is best known for being among the most prolific running backs in NFL history who notoriously cut his career short in its prime, leaving him just short of Walter Payton's all-time rushing record (which has been since broken by Emmitt Smith)