Aldon Smith injured his hip late in the first quarter on a run by Vikings quarterback Toby Gerhart. Smith, who is starting at outside linebacker this year, was cut down by a Vikings offensive player on the play and got up slowly. After the next play, he gingerly ran to the sideline and did not return.
On the first play that Smith missed, rookie Kourtnei Brown filled in at right outside linebacker. Veteran Parys Haralson, however, soon replaced him with the first-team defense.
Smith was diagnosed with a hip bruise and is questionable to return. He had a pronounced limp while on the 49ers sideline. Considering that the rest of the starters are not in the game, Smith's return is very unlikely.
-- Matt Barrows