The Seattle Mariners and Live Nation are teaming up for a major new concert venue across the street from T-Mobile Park. The 5,500-capacity venue will be located in the Boxyard complex at the site of the old Pyramid Brewery, which the team redeveloped in 2021, on First Avenue South. Live Nation and First Avenue Entertainment, the limited partnership which owns the Mariners and holds a long-term lease on the property, announced the deal Thursday. “Seattle has helped shape the sound of modern music, launching artists who have influenced culture worldwide,” Live Nation’s Pacific Northwest regional president Jeff Trisler said in a news release. “This new purpose-built venue is an investment in continuing that legacy.…