The Carolina Panthers' offensive line has taken another hit with Matt Kalil being declared week-to-week after undergoing an arthroscopic knee procedure. Kalil visited Dr. James Andrews for a second opinion on his right knee, and it was decided the best option was to undergo a procedure.

“He will be evaluated on a weekly basis,” head athletic trainer Ryan Vermillion said.

The Panthers' first regular-season game is only 19 days away against the Dallas Cowboys, so it is unclear if Kalil will be ready.

Starting right tackle Daryl Williams was lost during training camp with a dislocated right patella and torn medial collateral ligament in his right knee. Williams' injury isn't expected to be season-ending, but there is not a timetable for his return either.

The injuries have left the Panthers thin on the offensive line, but hopefully, the minor procedure will help Kalil. He has looked a step slow on a lot of the plays in preseason, and perhaps it was because the knee was bothering him. Quarterback Cam Newton has spent too much time on his back the last few years, and if these guys don't get healthy it appears this season might not be any different.

The Panthers' next preseason game is Friday against the New England Patriots, and Taylor Moon and Jeremiah Sirles are expected to get the start in place of Williams and Kalil. It will be a good test to see if they can be starters if need be this season.