KnowraAmerican footballLinked fromLinked fromThe 15 pages that link to American football, each with the reason it gives.All 15Broader topic 2Narrower topic 6Compared with 7QuarterbackNarrower topic: Quarterback duties are shaped by this sport’s downs, formations, and scoring rules.College footballNarrower topic: College football is the collegiate form of this broader sport.Jim ThorpeNarrower topic: Thorpe became one of professional football's early stars and helped establish the sport's credibility.Walter CampNarrower topic: Camp’s revisions helped turn this sport into a game distinct from rugby.Flag footballNarrower topic: Flag football adapts this sport while replacing tackling with flag removal.Red GrangeNarrower topic: Grange’s celebrity helped professional football compete for attention in a sport long dominated by college teams.