Association football | association football | football (soccer) | National Football League | American football | National Register of Historic Places | Forward (association football) | National Hockey League | college football | Goalkeeper (association football) | Defender (association football) | Football (soccer) | Football in Italy | England national football team | National Basketball Association | National Science Foundation | National Geographic | Australian Football League | National Trust | Australian rules football | National Endowment for the Arts | National Geographic Society | Argentina national football team | National Trust for Places of Historic Interest or Natural Beauty | National Park Service | National League | Australian National University | National Guard | National Geographic Channel | National Institutes of Health |
Stefan is second-cousin to the recently retired captain of, and all-time leading scorer for, the Swiss national football team, Alexander Frei, an accomplished striker twice voted Swiss player of the year, who used to play for Axpo Super League club FC Basel and is now the sports director for FC Luzern.