SAN DIEGO -- San Diego Chargers kicker Nate Kaeding is out for the season after MRI exams on Monday revealed he tore ligaments in his left knee, and is scheduled to have surgery.

"He planted and he kind of got spread out and there was no contact on the play," Chargers coach Norv Turner said. "It's about adversity and we'll handle it. Nate is unbelievable. Hopefully we can get someone who can be just as accurate."

Chargers defensive end Luis Castillo will also be out for an extended period of time with a broken tibia in his left leg. Turner wasn't sure yet if Castillo's injury would knock him out for the season and said further tests would be conducted Monday. A source told ESPN NFL Insider Adam Schefter that the team privately does not think Castillo will miss the season.

Third year defensive lineman Vaughn Martin is expected to see extended playing time in Castillo's absence.

"The way Vaughn Martin went out there and played at a real high level, he's an outstanding young football player," Turner said. "One of the things I felt last year is we played Luis and Jacques (Cesaire) too much, and these young guys we've wanted them to play more and now Vaughn will play a lot more."

Kaeding injured his left knee on the opening kickoff of the game and Castillo injured his left leg in the fourth quarter.

Both players were carted off the field after their injuries.