49ers defense gets another tough test vs. multi-faceted Saints offense

The 49ers defense has passed all of its tests this year, but Michael Thomas, Drew Brees and Alvin Kamara are a different type of challenge.

SS Marcell Harris

(Photo by Scott Taetsch/Getty Images)

Harris will get the start with Jaquiski Tartt sidelined by a broken rib. It took the second-year, sixth-round pick a few plays to get acclimated, but he played well against the Ravens’ exotic run-based offense and came up with a forced fumble and fumble recovery that turned the tide of the game in the third quarter. Harris gets another tough assignment against the Saints, and limiting big plays with smart football in the box and strong tackles in run support will be vital to slowing New Orleans down.