How new pitch turned Jonathan Holder into Yankees pen force

Jonathan Holder came back to the Yankees from Triple-A Scranton/Wilkes-Barre on April 21 hoping his new pitch would work, but ultimately unsure. The starter-turned-reliever had never thrown a slider before, but after a rocky start to the season in pinstripes, he went to the minors and began tinkering with one. Though Holder had always thrown…