What to know when the Vikings travel to play the Detroit Lions on Sunday afternoon: • Vikings at Lions • When: 12 p.m. Sunday • Where: Ford Field • TV: FOX • Radio: KFAN • Line: Lions -9.5 • Over/Under: 48.5

— Success for the Vikings hinges on getting quarterback J.J. McCarthy confident. He’s making his return after missing the past month and a half with a high ankle sprain. Can Kevin O’Connell get McCarthy easy completions? That has to potential to unlock everything else the Vikings want to do on offense. It’s also important that the Vikings establish the run so McCarthy doesn’t feel as though he has to win the game with his right arm alone. That would be a recipe for disaster.

— The Lions simply have to control the line of scrimmage on both sides of the ball. If they can

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