San Francisco 49ers open Fred Warner's practice window

Matt Lively reports on Fred Warner's possible return to the field for the San Francisco 49ers. Website: http://kpix.com/ YouTube: http://www.youtube.com/CBSSanFrancisco Facebook: https://www.facebook.com/CBSSanFrancisco Instagram: https://www.instagram.com/kpixtv/ Twitter: https://twitter.com/KPIXtv