J.J. McCarthy, the rookie quarterback for the Minnesota Vikings, is expected to undergo knee surgery to address a meniscus issue after experiencing soreness. The surgery could either be a trim, leading to a 4-to-6 week recovery, or a repair, which may sideline him for several months. This situation opens the door for Sam Darnold to secure the starting quarterback position for the Vikings. In his preseason debut, McCarthy showcased his potential by throwing two touchdown passes, making the competition for the starting role more intriguing.

• McCarthy's injury could significantly impact his rookie season and the Vikings' quarterback situation.
• Sam Darnold is now in a favorable position to start for the Vikings in Week 1.