White Sox new 'pen trio shuts down Indians

4/14/15: David Robertson strikes out David Murphy on a pitch in the dirt for the final out of the ballgameCLEVELAND -- Something needed to be done about the White Sox bullpen.

It was a unit that posted a collective 4.38 ERA last season -- the third worst in the Major Leagues. It was a unit that walked more batters than any other in baseball.

So the White Sox added right-handed closer David Robertson. They added lefty Zach Duke. They traded for lefty Dan Jennings. And on Tuesday night, the vision of a revamped bullpen constructed throughout the offseason became a reality during a 4-1 win against the Indians.

"Every time your roster changes, it changes the dynamic of your team," White Sox…