Eight different pitchers have started at least six games for the Twins this season:
Three of them — Phil Hughes, Ervin Santana and Ricky Nolasco — were high-dollar free agents.
Three of them — Kyle Gibson, Tyler Duffey and Trevor May — either came up through the Twins' organization or, in the case of May, came over as highly touted prospects in a trade.
Two of them — Tommy Milone and Mike Pelfrey — were largely afterthoughts. They were guys who provided depth and insurance but didn't figure much into more grand short- or long-term plans.
In modern baseball, though, you need those insurance plans — as has been proven by the Twins' need over the past several years to trot out far more than five starting pitchers over the course of a season.
Hughes and Nolasco have been injured. Santana was suspended for half the season. Those three pitchers, in whom the Twins have invested more than $150 million total, have the three worst ERAs among the eight Twins pitchers who have made at least six starts.
Combined, the three big-money guys have a 4.75 ERA in 250 innings of work this season. Hughes was largely OK before hurting his back, though he wasn't close to being as sharp as he was last year. Santana has pitched better lately, giving hope that his dreadful post-suspension run is done. Nolasco has had another lost year.
Combined, the two afterthoughts/depth guys, Pelfrey and Milone, have a 3.93 ERA in 256.2 innings pitched this season. Pelfrey has fallen off a cliff lately, but he pitched into mid-June with a sub-3.00 ERA and into September before it rose about 4. He has at least provided some value for his $5.5 million contact this season.