Question: The athlete Doug Scovil was credited with developing played with the NFL for how many seasons?
Sentence (from "Doug Scovil"): Following his stint as head coach for the San Diego State Aztecs, Scovil worked as the quarterbacks coach for the Philadelphia Eagles of the National Football League (NFL), where he was credited with developing Randall Cunningham, until his death from a heart attack at Veterans Stadium during the 1989 season.
Relevant evidence: Yes