Zack Greinke, Clayton Kershaw to face off for first time Friday

Clayton Kershaw and Zack Greinke used to make up the most potent 1-2 punch in MLB. Now they’ll trade punches on the mound.

Clayton Kershaw and Zack Greinke used to make up the most potent 1-2 punch in MLB. Now they’ll trade punches on the mound.