Atlanta Falcons quarterback Michael Penix Jr . suffered a potentially season-ending knee injury during Sunday's loss to the Carolina Panthers , sources told ESPN's Adam Schefter.

Penix will be seeking a second opinion, the sources told Schefter.

Veteran Kirk Cousins replaced Penix on Sunday in the eventual 30-27 overtime loss at home and will take over as the Falcons' starting quarterback with Penix sidelined. The loss dropped to Falcons to 3-7 this season.

Penix was 13-of-16 for 175 yards before getting hit with 5:22 left in the third quarter on an incomplete pass. Penix tried to get up but then hit the turf again and took off his helmet.

The is the second knee injury Penix has dealt with this season. He had a left knee bone bruise that kept him out of the Falcons' game against

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