Coach Mike Zimmer said Harnish was inadvertently stepped on by a teammate in practice Wednesday. Harnish saw a foot specialist and was diagnosed with a Grade 1 Lisfranc sprain. The Vikings were planning to try out other quarterbacks for Harnish's spot.
Zimmer also said tight end Kyle Rudolph is continuing to progress in his recovery from sports hernia surgery. There's a possibility he can return after the bye week for the Nov. 16 game at Chicago.
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