Aaron Rodgers contends Tampa's turf caused at least two injuries

Friday’s health and safety news from the world of football:

• NFL Media's Conor Orr reportedthat Green Bay Packers quarterback Aaron Rodgers told his weekly radio show that his calf injury was caused by the turf in Tampa.

• ESPN reported on a survey of NFL quarterbacks, the majority of whom say playing multiple sports was beneficial to their development.

• Tech News World wrote about the Oculus virtual reality viewer and its possible impact on football training.

• Sports Techie looked at the Hiji Band, a concussion-detecting headband geared toward youth sports.

• Healthcare Professionals Network reported on a University of Pittsburgh Medical Center study that said the benefits of youth football outweigh the risks.

• featured a retired educator who is on a mission to reduce injuries and asthma attacks in student athletes.

• The Arizona Republic looked at the concussion risk involved for football cheerleaders.

-- Bill Bradley, contributing editor