Sam Darnold left Friday's preseason finale against Buffalo on a golf cart with an injured left ankle.
He did not come back.
The Carolinas lost a quarterback in a preseason game. The third-round pick was hurt in the preseason game against New England.
If Darnold's injury is serious, the Carolinas would be down to two quarterbacks, including a former XFL star.
The Carolinas planned to keep three quarterbacks earlier in camp, with one of them being Corral. The mindset to keep two was altered by Corral's injury.
The defensive tackle hit him from behind as he ran to throw the ball. The body of Brewer rolled over the ankle of Darnold.
After staying down for a while, he was helped into a golf cart.
In a quarter and a half, he started and completed 9 of 15 passes for 89 yards and two scores. He was 5 for 11. He had a touchdown in the third quarter.
In a trade with the New York Jets, the Carolinas obtained Darnold. He was 4-7 as the starting pitcher.
Cleveland moved on from the first overall pick to the second after acquiring Deshaun Watson from Houston.
The team said there was an open competition for the starting job between the two rookies.
Gonzalez was carted off the field with a groin injury after he kicked into the net. Gonzalez injured his quad at Buffalo in December.