Aldon Smith lined up against rookie left tackle Jonathan Martin, a former Stanford star recruited by Harbaugh. Martin shifted to the left side in place of the injured Jake Long, placed on season-ending injured reserve Tuesday with an injured left triceps. Smith and Martin shoved each other all day, jawed and even butted helmets.
‘‘This game’s about power — speed and power,’’ Smith said. ‘‘I try to mix it up.’’
NOTES: Miami LB Koa Misi went down early in the third quarter with an ankle injury. ... The 49ers won nine games in back-to-back seasons for the first time since 2001-02. ... Under Harbaugh, the 49ers improved to 3-0 against the AFC East and 6-1 vs. the AFC. ... 49ers LB Tavares Gooden sustained a rib injury.
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