Championship series baseball players swear by $30 titanium necklaces: Should you?

Look closely at just about any Major League Baseball game, and you'll see them on almost every player -- necklaces made with titanium, magnets or other things in the team's colors worn around their necks.

Professional athletes wearing necklaces, during a game? A bulky fashion statement? Not exactly, They're filled with titanium or other materials that athletes think will improve their performance. Science isn't on their side.