Heading into the 2015 season, the Kansas City Royals expected that Yordano Ventura would be able to take over for James Shields and front their rotation. He certainly displayed plenty of poise during Game Six of the 2014 World Series, shutting down the Giants to stave off elimination. As he was coming off a year where he posted a solid 14-10 record with a 3.20 ERA and a 1.259 WHiP, he seemed ready to take the next step.
Instead, we all know how that turned out. Ventura was unable to keep him emotions in check during the early part of the season, and he continued to struggle.