Wednesday's health and safety news from the world of football:
- ESPN reported that the NFL has investigated the Dallas Cowboys' offseason training activities after the season-ending knee injury to linebacker Sean Lee, but found no wrongdoing by the team. No contact is allowed and no pads can be worn during OTAs, according to the collective bargaining agreement.
- Windy City Gridiron reported that Chicago Bears coach Marc Trestman has joined the national advisory board of the Positive Coaching Alliance, an organization that promotes positive role models as coaches.
- NBC News offered video of Minnesota Vikings linebacker Chad Greenway helping to rescue two stranded boaters in Minneapolis' Lake Minnetonka.
- PhiladelphiaEagles.com published a photo gallery of the Eagles hosting Junior Pro Day.
- MiamiDolphins.com reported that the team raised $3 million for area charities during its annual Fins Weekend.
- CSN Washington talked to Washington Redskins quarterback Robert Griffin III, who said he is starting a camp for kids from an area high school.
- KTVB-TV in Boise, Idaho, reported that after the Virginia Tech star ratings were released, the Optimist Youth Football League in that city replaced 900 helmets.
- The Huffington Post looked at the FITGuard, a mouthguard that lights up when there is impact to the mouth that could be related to a concussion.
- WOSU-FM in Columbus, Ohio, reported on research at Ohio State University that found genetics are partly to blame for girls being more susceptible to serious knee injuries than boys.
-- Bill Bradley, contributing editor