How a new MLB rule could change baseball games this season

Home plate umpire Jim Wolf waits as the pitch clock counts down during the first inning of a spring training baseball game between the Milwaukee Brewers and the Los Angeles Dodgers Saturday in Phoenix. (Morry Gash/AP)

There are a few key rule changes coming to Major League Baseball this season, but one in particular already is throwing players for a curve.

Spring training games underway in Florida and Arizona have featured a new pitch clock, which gives pitchers a set amount of time before they have to throw the ball.