From the Pittsburgh Post Gazette:
In 2011, Mr. Luckasevic filed the first lawsuit of its kind against the NFL on behalf of former players who were seeking damages for brain injuries. He praised the usefulness of the RC21X test.
“It’s a really objective test, giving us a kind of baseline of performance,” said Mr. Luckasevic, who represents more than 500 former players. “It can monitor change, like a blood pressure cuff or thermometer.