Chris Borland, 24, to Retire From NFL

You're a 24-year-old professional football player. You signed a nearly $3 million contract with the San Francisco 49ers and banked a $600,000 bonus. You're looking real pretty after a stellar rookie season. But there's something seriously bothering you. You keep thinking, what if, one day, all those hits, those concussions, add up? Is your health really worth the risk?
Chris Borland said Tuesday night that it just wasn't, and he has chosen to retire from the NFL to avoid long-term injuries he could suffer from head injuries.