Carolina's fears have been confirmed.

Panthers offensive tackle Daryl Williams has been diagnosed with a dislocated patella and torn MCL in his right knee after being injured during Saturday's training camp practice, the team announced.

“Daryl Williams dislocated his right patella and tore the medial collateral ligament in his right knee in this morning’s practice,” head athletic trainer Ryan Vermillion said Saturday in a statement. “We are beginning the early stages of rehabilitation, and there is currently no timetable for his return.”

Williams went down screaming in pain Saturday morning after he sustained contact from defensive ends Zach Moore and Vernon Butler in pass protection and was carted off the field.

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Despite the discouraging news, Williams has not been ruled out for the season.

Williams, 25, has started 28 games in his three seasons with the Panthers, including all 16 last season.

The team had begun negotiations on a new deal with Williams, who is in the final year of his contract, though those discussions could be put on hold.