Special Appearance Saturday by Jermaine Kearse  PITTSBURGH, 2015-10-13 — /EPR Retail News/ — DICK’S Sporting Goods (NYSE: DKS), the largest U.S.-based, full-line omni-channel sporting goods retailer, will be opening its seventh store in Washington and 640thstore nationwide on Friday, October 23rd at The Marketplace in Marysville, WA (2609 172 Street NE). DICK’S three-day grand opening celebration will run through…