"The data was just so compelling ... I think people need to continue to have this conversation and become more aware of it," Jones told WGBH News this week.
That data came from Concussion Legacy Foundation Co-Founder Chris Nowinski, a former college player and professional wrestler who has made it his mission to make sports safer. Nowinski says research shows that brain development in kids between ages 8 and 13 is vulnerable to the kinds of impacts that go along with tackle football.
"There's evidence out of the Boston University CTE Center that football players who started before age 12 were worse off long-term, with higher rates of depression, higher rates of anxiety, higher rates of memory issues than those who started at 12 or later," Nowinski said.
New York, California, Maryland, Illinois and New Jersey are considering similar bills, but no state has yet passed a ban into law. The sponsors of the Massachusetts bill agree that this is only the beginning of a debate on whether to ban tackling and at what age.