It's been proven time and again that pitching wins championships. While the Boston Red Sox got to the postseason last year on the strength of the league's No. 1 offense, their pitching staff stepped up big in the playoffs and helped them claim the title.
At the beginning of the season, I wrote an article ranking all 30 MLB starting rotations. With the regular season a quarter of the way done, it's time to update those rankings, and what follows is a look at how all 30 rotations stack up here in the middle of May.
It's important to note that these rankings are not based on what the rotation could look like at midseason or come playoff time but rather how they stand right now. In other words, injuries have to be taken into account.
Outside of the current rotation, I've included a look at any other pitchers who have made a start this season*. However, those guys did not factor into the rankings, at least not in a positive way.
*Stats for pitchers who have pitched in both starting and relief roles this season reflect only what they have done as starters.