It's a coupla months old, but I just stumbled upon this FanGraphs article, which suggests that a big part of the success for the Mets pitching staff is that they're throwing a pitch not readily available to pitchers on other teams, a slider with a little less concern for break and a little more for power, tight spin, and location. �Dan Warthen helped me out with the grip during Spring Training. I threw it last year, but I didn�t really know how to throw a slider.� � Matt Harvey, 2012 �When I came here in September last year, Dan Warthen showed me how to throw a slider,� said a beaming Mejia, back in a major league clubhouse. �Then I threw it in winter ball. And now I throw it perfect.� � Jenrry Mejia, 2013 �[it has] small, quick, movement at the end. ... [i have] more command of it. ... [You throw it like a fastball, and] at the last point you just flick your fingers a little.� � Jeurys Famila, 2015 �I played with it a little bit to pick up the RPMs on my curveball.� � Noah Syndergaard, non-user, 2015 Jacob deGrom, before and after.