MLB pitching tiers: Ranking every staff from 1-30

As baseball hurtles towards the halfway point of the season, many of the projections, prognostications and predictions from the start of the season are in shambles. This is a typical occurrence of course, because predicting the future is a foggy endeavor. Projections should never stand still, and should always take into account new events.

So in that light, the midway marker is a good point at which to reconsider how we feel about players and teams. My colleague Jay Jaffe has already tackled the starting lineups, so I'm taking the challenge of ranking the 30 pitching staffs in terms of what the rest of the season will look like. Although I utilize the ZiPS projections to inform these…