T-Mobile Park — Dimensions, Park Factors & Intelligence

T-Mobile Park is the home ballpark of the Seattle Mariners, located in Seattle, Washington. The stadium opened in 1999 and seats approximately 47,929 fans. It sits at an elevation of roughly 10 feet above sea level and operates in the Pacific (PT) time zone. The playing surface is grass. Its retractable roof lets the club open or close the park depending on weather. From a hitter's and pitcher's perspective, the outfield measures 331 feet down the left-field line, 378 feet to left-center, 401 feet to straightaway center, 381 feet to right-center, and 326 feet down the right-field line. Its deepest posted distance is center field at 401 feet, while the most reachable corner is right field at 326 feet. As one of the 30 active Major League Baseball ballparks, T-Mobile Park combines these fixed dimensions, its 10-foot elevation, and its retractable configuration to shape how the ball carries, how pitchers attack the zone, and how run scoring plays out across a season. The Seattle Mariners compete in the AL West of the American League, and this venue serves as their fixed home environment for all home games on the schedule. Relative to a typical big-league outfield, the 401-foot center-field distance and 328-foot average corner here place T-Mobile Park on the deeper, more spacious end of the league spectrum. The reference figures on this page are evergreen stadium facts rather than daily projections, and they anchor EdgeRanked's park-adjusted MLB projection, weather, and results coverage for this venue.

As a retractable-roof ballpark at roughly 10 feet of elevation, T-Mobile Park is shaped by real weather. Warmer air and lower humidity let the ball carry farther, while cool, damp, or heavy marine air suppresses fly-ball distance. Wind direction matters most: a breeze blowing out turns fly balls into home runs, while an inbound wind knocks them down. Wind is a meaningful, regularly-felt factor here. When the roof is closed, those weather effects are largely neutralized. These effects are evergreen tendencies; EdgeRanked layers live forecasts on top of them for game-day projections.

T-Mobile Park carries a distinct on-field character driven by its geometry, elevation, and exposure to the elements. The park stands at about 10 feet of elevation in Seattle, Washington, a factor that influences how far well-struck balls travel and how much break pitchers can generate. The corners are close to symmetrical (331 feet to left, 326 feet to right), so neither batter handedness gains an obvious pull-side advantage from the foul lines. Center field plays a fairly standard 401 feet. With a retractable roof, conditions can swing between fully exposed and climate-controlled depending on whether the roof is open, which can meaningfully change how the ball carries on a given night. On EdgeRanked's deterministic park-intelligence scale, T-Mobile Park plays close to neutral for run scoring, grading 56/100 for run environment and 58/100 for home runs. Its extra-base-hit environment rates 57/100, reflecting how the gaps and 401-foot center field reward doubles and triples, while pitcher friendliness sits at 49/100. The natural-grass surface plays at a conventional infield speed, with hop and reaction times typical of a grass field. With a seating capacity of roughly 47,929, the park's scale and configuration also influence foul territory and the overall feel of at-bats for both hitters and pitchers. Located in Seattle, Washington within the Pacific (PT) time zone, T-Mobile Park carries an EdgeRanked weather sensitivity rating of 46/100, a measure of how much day-to-day conditions can move its scoring environment relative to other Major League ballparks. Signature characteristics include: Marine air; Pitcher-friendly reputation; Retractable roof (umbrella). Taken together, these traits make T-Mobile Park a unique environment within Major League Baseball, and they feed directly into EdgeRanked's park-aware projection, weather, and results coverage for Seattle Mariners games.