Seattle Mariners will host Union Night on Friday, August 25th as your Seattle Mariners take on the Kansas City Royals at 7:10pm. Discounted tickets are available for $35 Main and $18 View level seats. The event will include a Mariners-themed commemorative hat. Groups of 20+ are eligible for two (2) complimentary tickets to a future game and your group name on the Videoboard after the 3rd inning. They would love to have your local join us at the ballpark! Find a…