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What is notable about Walter Payton's playing style?
Payton refused to deliberately run out-of-bounds and always delivered some punishment to his tacklers before being forced off the field or forced down.
What else did Walter Payton do other than refuse to run out-of-bounds and punish tacklers?
One of Walter Payton's signature maneuvers was the stutter-step, a high-stepping, irregularly paced run.
Did Walter Payton have any other moves besides the stutter-step?
Walter Payton re-invented the practice of stiff-arming his tacklers, which had gone out of favor among running backs in the 1970s.

Question: What else is significant about his style?
Self-contained rewrite: What else is significant about Walter Payton's style other than his refusal to run-out-of-bounds, punish tacklers, stutter-step and stiff-arm tacklers?