A star NFL player was seen reading a self-help book during a playoff game. It's now the top-selling book on Amazon

Over the years, cameras have caught NFL players doing some memorable non-football things on the sidelines during games. Tom Brady once hurled an electronic tablet in frustration. Three members of the Seattle Seahawks were fined for eating hot dogs during a 1995 preseason game.

Over the years, cameras have caught NFL players doing some memorable non-football things on the sidelines during games. Tom Brady once hurled an electronic tablet in frustration. Three members of the Seattle Seahawks were fined for eating hot dogs during a 1995 preseason game.

On Sunday evening in Philadelphia, as the Eagles hosted a playoff game against the Green Bay Packers, wide receiver A.J. Brown did something arguably even more intriguing.

He sat down and opened a book.

As the Eagles ground out their 22-10 victory, cameras showed Brown on a sideline bench, studying a well-worn paperback. One of the Fox Sports broadcast announcers chuckled. “I haven’t seen too many people read books (during a game),” he said.

The book is called “Inner Excellence: Train Your Mind for Extraordinary Performance and the Best Possible Life.” It was written by Jim Murphy, a former professional baseball player and self-described “performance coach” who helps athletes build mental toughness.

Brown is one of the Eagles’ best players. Only three passes went in his direction on Sunday, and he caught only one, for just 10 yards. Still, when he took questions after the game, he was cheerful.

This may have been the first time he’d been reading on camera. But he said it wasn’t the first time he’d read that book during a game.