Stern Pinball Announces Stern Pro Circuit Championshiphttps://www.prnewswire.com/news-releases/stern-pinball-announces-stern-pro-circuit-championship-300789737.htmlCHICAGO, Feb. 5, 2019 /PRNewswire/ — Stern Pinball, Inc., a global lifestyle brand based on the iconic and outrageously fun modern American game of pinball,…