The Shanahans' zone-blocking schemes may not fit 49ers

Daily 49ers blog for NBC Bay Area website: Mike and Kyle Shanahan have run successful NFL offensive schemes, but the candidates for 49ers' positions rely on zone-blocking schemes that may not fit current personnel. http://www.nbcbayarea.com/news/sports/Shanahans-Zone-Blocking-Schemes-Might-Be-a-Problem-for-49ers-288057061.html