Will Tukuafu having MRI, Harbaugh “encouraged” with fullback’s movement

The 49ers saw fullback Will Tukuafu leave Sunday’s 23-10 victory over the Panthers after just a handful of snaps because of a left knee injury he suffered after catching a pass from Colin Kaepernick. The injury looked bad when it happened, but Tukuafu was able to walk off the field with medical personnel a short…