[1] 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.

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.

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.

[7][8] T-Mobile Park is in the SoDo district of downtown Seattle, bounded by Dave Niehaus Way (a block of 1st Avenue S.) to the west, Edgar Martínez Drive (formerly S. Atlantic Street)[9] to the south, Royal Brougham Way to the north, and BNSF railroad tracks to the east.

[11] On March 30, 1994, county executive Gary Locke appointed a task force to assess the need for a new baseball stadium to replace the rapidly deteriorating Kingdome.

King County held a special election on September 19, asking the public for this sales tax increase;[12] the measure led early,[13][14] but was narrowly defeated by one-fifth of one percent.

[17] Nine days later, the King County Council approved the funding package,[18] and established the Washington State Major League Baseball Stadium Public Facilities District to own the ballpark and oversee design and construction.

[21] Initial concepts for the new stadium, developed under the working name of New Century Park, were unveiled by architecture firm HOK in March 1995.

[29][30] Longtime team broadcaster Dave Niehaus threw out the ceremonial first pitch at the game to Tom Foley, the former Speaker of the United States House of Representatives.

"[39] The Mariners moved the fences at Safeco Field closer to home plate before the 2013 season "to create an environment that is fair for both hitters and pitchers," according to General Manager Jack Zduriencik.

[47] It includes concession stands operated by chain as well as local restaurants, such as Ivar's, Kidd Valley, Salt & Straw, and Din Tai Fung.

[60] In the open position, the roof rests over the BNSF Railway tracks that bound the stadium to the east, with part of it hanging over the stands in right field.

[69] Co-located with the Baseball Museum of the Pacific Northwest, the Mariners Hall of Fame features bronze plaques of the eleven inducted members: Alvin Davis (1997), Broadcaster Dave Niehaus (2000), Jay Buhner (2004), Edgar Martínez (2007), Randy Johnson (2012), Dan Wilson (2012), Ken Griffey Jr. (2013), Lou Pinella (2014), Jamie Moyer (2015), Ichiro Suzuki (2022), and Félix Hernández (2023).

[70] The 'Pen, known for sponsorship purposes as "The T-Mobile 'Pen", is a standing-room only area adjacent to the bullpens, where spectators can watch relief pitchers warm up before entering the game.

In 2013, the Mariners' vice president of ballpark operations described the Bullpen Market as a dark and unwelcoming place that needed a remodel to be more attractive to fans.

[71] Prior to the 2011 season, the Mariners brought in three celebrity chefs to introduce special concession stands with exclusive food options.

[71] Local Mexican restaurant Poquitos opened a stand in The 'Pen during the 2017 season, and quickly gained national fame for selling chapulines, toasted grasshoppers, at every game.

A team spokesperson said that the Mariners assign more uniformed police officers, private security guards, and alcohol enforcement officials to The 'Pen during special events, such as College Night.

His scorebook is opened to the box score for Game 5 of the 1995 American League Division Series, when Edgar Martínez hit "The Double".

[87] On April 21, 2012, Chicago White Sox pitcher Philip Humber pitched the 21st perfect game in Major League Baseball history against the Mariners in his second start of the season.

The Tacoma Rainiers played their 2010 Pacific Coast League playoff semifinal games at then-Safeco Field while Cheney Stadium underwent off-season renovations.

[96] On May 4, 2007, an NCAA Pacific-10 Conference baseball attendance record was set when the Washington Huskies hosted defending National Champion Oregon State in front of 10,421 spectators.

[99] On March 2, 2002, the United States men's national soccer team played Honduras in a friendly match, winning 4–0 in front of a then-record crowd of 38,534.

The 2024 NHL Winter Classic on January 1 was held at T-Mobile Park and was contested by the Seattle Kraken and the Vegas Golden Knights.