McCarthy underwent a procedure on his right knee this week after an increase in his rehab work caused some swelling, Kevin Seifert of ESPN.com reports.
In the wake of a successful preseason debut back on Aug. 10, McCarthy reported soreness in his right knee, and he eventually was diagnosed with a torn meniscus, which required surgery Aug. 14. Considering he was placed on injured reserve before Week 1, the rookie first-round pick isn't eligible to play this season, so getting him healthy will be a priority for the Vikings as he heads into his first full offseason. In the meantime, the Vikings will continue to entrust the offense to quarterback Sam Darnold.