Conversation so far:
What type of legacy did John Heisman leave behind?
John Heisman was inducted into the College Football Hall of Fame as a coach in 1954. He was an innovator and master strategist.
What type of innovation was John Heisman known for?
John Heisman developed one of the first shifts.

Question: What was the shift he developed called?
Self-contained rewrite: What was the shift John Heisman developed called?