The Boston University study links cognitive and behavioral problems later in life — among all players, not just in the N.F.L. — to playing tackle at a young age.

Jerry Kill’s epilepsy forced him off the sidelines two years ago. But he’s back this season, managing his health and his love of the game with the blessing of his family, and his boss.

In a dominant performance against the Saints, Brady also displayed a mastery of the rulebook.

The Washington Nationals pitcher has made just one postseason start in his career. That, he hopes, is about to change.

A Connecticut statute provides free-speech protections beyond the First Amendment, making it illegal for ESPN to punish Hill, according to some labor lawyers.

Josh McCown had many stops along the way to starting for the Jets. One of them was a two-season stint teaching the game to teenagers.

The Indians surpassed the 1935 Chicago Cubs for the longest winning streak in the last 101 seasons and are now four short of the major league record, held by the 1916 New York Giants.

The average fastball was 89 m.p.h. in 2002. Now it’s nearly 93. A big fastball doesn’t guarantee a pitcher’s success, but without it, he may be ignored.

The N.F.L. has a jam-packed slate, including a rematch of last year’s N.F.C. championship game. Here’s who we think will win.

“I really haven’t known how to deal with life,” says Marinovich, a starting quarterback in the World Developmental League.