Not happening: Vikings downgrade Adrian Peterson to out versus Falcons

The Minnesota Vikings have made official what was assumed all along.

Adrian Peterson is out for Sunday's game against the Atlanta Falcons.

The Vikings downgraded him from doubtful on the injury report after Saturday's walkthrough, ruling out their All-Pro halfback shortly before boarding their flight to Atlanta.

Peterson suffered a Grade 1 high ankle sprain and ligament damage in his left ankle when Oakland safety Michael Huff rolled awkwardly onto his leg in last weekend's loss. He was in a walking boot until Thursday.

Frazier said at midweek that Peterson wouldn't play if he couldn't practice. But he left the window open slightly on Friday, saying Peterson was "very, very doubtful."

With Peterson out, second-year pro Toby Gerhart is expected to start at halfback. Lorenzo Booker and Percy Harvin also are likely to get some time in the backfield.

Tom Pelissero is Senior Editor and columnist for 1500ESPN.com. He hosts from 6 to 8 p.m. weeknights and co-hosts from 10 a.m. to noon Sundays on 1500 ESPN Twin Cities.
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