Buster Posey
The Brewers promoted Peña to the major leagues from the Colorado Springs Sky Sox of the Class AAA Pacific Coast League on September 4, 2015. He became the first reliever in Major League history to give up three home runs on Opening Day when Denard Span, Joe Panik and Buster Posey of the San Francisco Giants hit consecutive homers off him in the eighth inning on April 4, 2016.