WBTV in Charlotte has video of Carolina Panthers linebacker Thomas Davis going down and clutching his surgically-repaired right knee during individual drill at yesterday's voluntary "Organized Team Activity" session.

Davis, who tore the ACL in that knee last November, would walk off under his own power, but is expected to undergo further tests today to determine the severity of the injury.

A restricted free agent, Davis had signed an injury-protection waiver before signing his one-year, $3.268 million dollar tender on Tuesday.