T-Mobile Park

T-Mobile Park
The Safe
Electric Factory
T-Mobile Park (then Safeco Field) in 2007
T-Mobile Park
Location in Seattle
T-Mobile Park
Location in Washington State
T-Mobile Park
Location in the United States
Former namesSafeco Field (1999–2018)
Address1250 First Avenue South
LocationSeattle, Washington, U.S.
Coordinates47°35′28″N 122°19′59″W / 47.591°N 122.333°W / 47.591; -122.333
Public transit Stadium
King Street Station
OwnerWashington State Major League Baseball Stadium Public Facilities District
OperatorWashington State Major League Baseball Stadium Public Facilities District
CapacityBaseball: 47,929
Football: 30,144
Record attendanceWrestleMania XIX 54,097
Field sizeLeft Field – 331 ft (101 m)
Left-Center – 378 ft (115 m)
Center Field – 401 ft (122 m)
Right-Center – 381 ft (116 m)
Right Field – 326 ft (99 m)
Backstop – 69 ft (21 m)
SurfaceKentucky Blue Grass /
Perennial Ryegrass blend
Construction
Broke groundMarch 8, 1997 (1997-03-08)
OpenedJuly 15, 1999 (1999-07-15)
Construction cost$517 million
($977 million in 2024 dollars)
ArchitectNBBJ
360 Architecture
Project managerThe Vosk Group LLP
Structural engineerMagnusson Klemencic Associates
Services engineerFlack + Kurtz Inc.
General contractorHunt-Kiewit
Main contractorsThe Erection Company Inc.
Tenants
Seattle Mariners (MLB) 1999–present
Seattle Bowl (NCAA) 2001
Website
mlb.com/mariners/ballpark

T-Mobile Park is a retractable roof ballpark in Seattle, Washington, United States. It is the home stadium of the Seattle Mariners of Major League Baseball and has a seating capacity of 47,929. It is in Seattle's SoDo neighborhood, near the western terminus of Interstate 90 and is owned and operated by the Washington State Major League Baseball Stadium Public Facilities District. The first game at the stadium was played on July 15, 1999.

During the 1990s, the suitability of the Mariners' original stadium—the Kingdome—as an MLB facility came under question, and the team's ownership group threatened to relocate the team. In September 1995, King County voters defeated a ballot measure to secure public funding for a new baseball stadium. Shortly thereafter, the Mariners' first appearance in the MLB postseason and their victory in the 1995 American League Division Series (ALDS) revived public desire to keep the team in Seattle. As a result, the Washington State Legislature approved an alternate means of funding for the stadium with public money. The site, just south of the Kingdome, was selected in September 1996 and construction began in March 1997. The bonds issued to finance the stadium were retired on October 1, 2011, five years earlier than anticipated.

T-Mobile Park is also used for amateur baseball events, including the Washington Interscholastic Activities Association high school state championships and one Washington Huskies game per season. Major non-baseball events that have been held at T-Mobile Park include the 2001 Seattle Bowl and WrestleMania XIX in 2003, which attracted the stadium's record attendance of 54,097.

The stadium was originally named Safeco Field under a 20-year naming-rights deal with Seattle-based Safeco Insurance. T-Mobile acquired the naming rights on December 19, 2018, and the name change took effect on January 1, 2019.