CHARLOTTE, N.C. -- Carolina Panthers rookie offensive tackle Daryl Williams will miss two to four weeks with a sprained medial collateral ligament in his right knee.

Williams suffered the injury on Graham Gano's first field goal attempt in the first half of Sunday's 20-9 victory over Jacksonville while playing on the right side.

"It's crazy how it happened," Williams said after returning from an MRI that confirmed the sprain. "Literally, right when the ball was kicked and it went through the uprights, a guy fell on the back of my knee.

"It was just bad luck."

Williams was the backup to right tackle Mike Remmers, but was slated to get work with the first team so Remmers could move to center and relieve Ryan Kalil.

Kalil, who missed the final two preseason games with a sprained knee, played all 71 snaps with Williams sidelined and backup tackle Nate Chandler inactive with a knee injury.

Carolina coach Ron Rivera said Kalil got through the game without a setback. He said Amini Silatolu will figure into whatever mix the Panthers have as a backup tackle.

Williams said the knee is the same one he sprained three years ago at Oklahoma. He was out four to six weeks with that injury, which he described as worse.