Kelvin Herrera: Baseball Rainmaker
A year ago, one of baseball’s best individual player stories was Kris Medlen, of the Braves. Previously something of a forgotten man, Medlen threw 138 innings as a reliever and then as a starter, allowing just 26 runs and six dingers. The year before, Pirates sinkerballer Charlie Morton made a name for himself by starting 29 times and allowing just six dingers. The year before that, Brett Anderson was outstanding for the A’s when healthy, making 19 starts and riding his sinker while allowing just six dingers. This year, the Royals are looking like an early American League surprise, and one of their best arms out of the bullpen is Kelvin Herrera. But over just 14 games, Herrera has already allowed six dingers, his latest coming on Monday.
Maybe we don’t need to compare Herrera to other pitchers, who don’t have anything to do with him. As fun as it is to compare opposite extremes, if we want to make a point we need only compare Herrera to himself. Already in 2013, Herrera has seen six batted balls fly over the fence. Last season — over a full season — Herrera saw four batted balls do the same thing. Against 17% as many opposing hitters, Herrera has allowed 150% as many home runs, and that’s a thing for us to talk about.