The 49ers run defense catches a groove; huge challenge upcoming for tackle Jonathan Martin; the key to Justin Smith's reign of terror.
This is the second part in a series that spotlights three 49ers-Chiefs matchups to watch Sunday, 1:25 p.m., Levi’s Stadium.
SANTA CLARA – Defensive coordinator Vic Fangio’s plan was to create an environment during 49ers practices that would be more difficult than facing the Philadelphia Eagles and their up-tempo offense
Programming note: For comprehensive 49ers coverage from Santa Clara, tune in to Yahoo SportsTalk Live tonight at 5 & 11 on Comcast SportsNet Bay Area.
SANTA CLARA – Linebacker Patrick Willis did not participate in practice Wednesday due to a wrist injury, according to the team's official injury report.