Question: In what event, featuring the Dolphins and the Redskins, did John Riggins participate in?
Sentence (from "John Riggins"): He was known for his powerful running style and productivity well into the latter years of his career; in 1983 at age 34, he rushed for an NFL single-season record 24 touchdowns, and again led the league in rushing touchdowns the following season at age 35.
Relevant evidence: No