What are some key factors for the New York Yankees in their upcoming series as they attempt to remain undefeated?

The Yankees got off to just about the best possible start to the season, sweeping the Milwaukee Brewers right out of town.

The Arizona Diamondbacks will travel to New York to take on the Yankees in a three-game series beginning Tuesday. After a 2-2 split with the Chicago Cubs in the opening series, the D-backs will face a ...