Vikings end Brian Robison to undergo MRI after spraining shoulder

ST. LOUIS -- Brian Robison left the Minnesota Vikings' locker room with his right arm in a sling after suffering a sprained AC joint in the first quarter of Sunday's win over the Rams.

"We'll learn more about it after they do an MRI and he'll probably be day-to-day this week during practice," coach Leslie Frazier said.

Robison was injured on a run play and stayed down for some time before being helped up by trainers. His return initially was announced as questionable, but the Vikings announced at halftime Robison wouldn't return.

Everson Griffen took Robison's place at left end and returned an interception 29 yards for a touchdown in the second quarter.

Frazier said there were no other significant injuries in the game. Safety Mistral Raymond dropped out in the second quarter with an apparent right calf cramp but quickly returned.

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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