Mariners swipe longtime Yankees coordinator Tanner Swanson as bench coach

Tanner Swanson, who had been the Yankees’ catching coordinator since November 2019, is leaving to become the bench coach of the Mariners, The Post has learned. The Washington native and Central Washington University graduate will serve under Jason Kanzler, who was named Seattle’s manager earlier this week. Swanson had gained a strong reputation since going from the Twins organization to the Yankees, a tenure during which he helped the Yankees rise to the forefront of framing by their catchers .