NEW ORLEANS -- The Baltimore Ravens' defense dominated the right side of the San Francisco 49ers' offensive line during a 2011 game in Baltimore.The 49ers made a significant upgrade since then by moving Alex Boone into the lineup at right guard. Anthony Davis remains the right tackle. Davis is less than three months past his 23rd birthday and he already owns 52 career starts, counting playoffs.The 49ers' offensive line has given quarterback Colin Kaepernick an exceptionally clean pocket during playoff victories against Green Bay and Atlanta.