Quick take: Jackson injured in Vikings win

What we learned...

Jackson injured:Vikings QB Tarvaris Jackson got off to a good start, going 4 of 6 for 53 yards, including a 23-yard touchdown pass to WR Martin Nance, but left the game with an injured right knee in the first quarter. Jackson appeared to injure the knee while scrambling to his right and being tackled by LB Antwan Barnes. He stayed in the game but hobbled off the field two plays later and did not return. Jackson finished 7 of 11 passing for 82 yards.

Allen agressive: Newly acquired defensive end Jared Allen, notched his first tackle as a member of the Vikings, recording two sacks in the second quarter. Allen finished with three tackles.

Rice is nice: Starting for the second consecutive game, Ravens rookie RB Ray Rice ran confidently, making sharp cuts for substantial yardage. On the Ravens' opening possession, Rice took his first carry 42 yards up the middle, later finishing the drive with a six-yard touchdown run. Rice finished the game with 77 yards on eight carries.

QB Smith struggles: Second-year QB Troy Smith, competing for a spot as Baltimore's No.1, looked shaky in his first start of the preseason. Smith opened a two-minute drill at the end of the second half with an interception on a pass intended for Mark Clayton. Smith was removed before the following possession, finishing the day 3 of 5 for 25 yards.

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