Adam Wainwright believes expanding the strike zone would speed up the game of baseball.

Baseball faces longer games this season with the introduction of expanded replay and challenges.

"All of the talk for everybody, all the critics, is about the speed of play," Wainwright said.

"Speed of play this and speed of play that. But really the only way to do that, to speed things up, is to expand the strike zone. ... There are millions of dollars being made on the commercials. Millions. And yet they want to talk about the speed of play. If you want to keep the commercials, open the strike zone up."