Perhaps we should be used to this by now. Just four years ago, Craig Kimbrel was just some guy who walked more than 18 percent of the batters he faced. Now, he’s Craig Kimbrel. In the same timeframe, Drew Storen went from talented rookie set-up man to closer on a suddenly not terrible Nationals team. In their wake, young relievers like Kenley Jansen, Kelvin Herrera, Trevor Rosenthal, Addison Reed and others have taken the baseball world by various degrees of storm. And there was this Aroldis Chapman guy, too.
This season has been no different. Seemingly anonymous relievers have been springing from the figurative woodwork to capture spots on the top of various reliever leaderboards, most notably K% and velocity. Let’s meet some of them, shall we?