"The nation's largest youth football program, Pop Warner, saw participation drop 9.5 percent between 2010-12, a sign that the concussion crisis that began in the NFL is having a dramatic impact at the lowest rungs of the sport.
According to data provided to 'Outside the Lines,' Pop Warner lost 23,612 players, thought to be the largest two-year decline since the organization began keeping statistics decades ago. Consistent annual growth led to a record 248,899 players participating in Pop Warner in 2010; that figure fell to 225,287 by the 2012 season.
Pop Warner officials said they believe several factors played a role in the decline, including the trend of youngsters focusing on one sport. But the organization's chief medical officer, Dr. Julian Bailes, cited concerns about head injuries as 'the No. 1 cause.'"