EL SEGUNDO, Calif. — Los Angeles Chargers centre Tyler Biadasz injured his left knee in the team's joint practice with the San Francisco 49ers.
The team said Wednesday that Biadasz underwent imaging a day earlier and is seeking additional opinions.
Biadasz was carted off the field after going down when 49ers defensive tackle Sebastian Valdez fell into his leg during an 11-on-11 drill.
Biadasz signed with the Chargers in March after starting 31 games over two seasons with the Washington Commanders before being released.
The Chargers host the 49ers on Thursday in the teams' second pre-season game.
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