Chargers kicker Nate Kaeding is scheduled to have an MRI exam Monday on what could be a serious injury to the anterior cruciate ligament in his left knee.
Kaeding was hurt during the opening kickoff Sunday, which Minnesota's Percy Harvin returned 103 yards for a touchdown. The Chargers rallied to win 24-17.
Punter Mike Scifres had to take over place-kicking duties. He made the first field goal of his nine-year NFL career, a 40-yarder that helped the Chargers rally.
If Kaeding is lost for the season, the Chargers will likely try to sign a replacement as soon as possible.