What happened: Kyler Murray suffered a concussion early in Minnesota's 39-22 win over Green Bay, per ESPN's Adam Schefter and Chris Seifert. Murray was evaluated on the sideline after his helmet was knocked off on a hit from Javon Bullard. Carson Wentz replaced him under center.

Why it matters: O'Connell named Murray the Vikings' starter in August, and the concussion now puts that plan in question entering Week 2. Wentz, kept on the roster over J.J. McCarthy for the backup role, becomes the direct contingency if Murray can't clear the league's protocol in time.

What to watch: Murray's availability for Week 2 hinges on clearing the NFL's concussion protocol.