Chase Field is the retractable-roof home of the Arizona Diamondbacks in downtown Phoenix, Arizona — the ballpark that proved you could play natural-conditions baseball in a desert where summer highs regularly clear 110°F. Since opening in 1998, it has hosted two World Series, an All-Star Game, and one of MLB’s most famous novelty features: a swimming pool beyond the right-center-field wall.
If you’re looking for the numbers — field dimensions, seating capacity, or exactly what to call the Diamondbacks’ stadium — here’s the complete, up-to-date breakdown, along with the history and quirks that make it one of baseball’s most distinctive parks.
Quick Answer
Chase Field, home of the Arizona Diamondbacks in downtown Phoenix, seats 48,330 fans and plays 330 feet down the left-field line, 374 feet in the power alleys, 407 feet to straightaway center field, and 334 feet down the right-field line. It opened in 1998 as Bank One Ballpark, was renamed Chase Field in 2005, and is best known for its retractable roof and right-center-field swimming pool.
Stats at a Glance
Team: Arizona Diamondbacks (MLB). Location: 401 E. Jefferson Street, Downtown Phoenix, Arizona. Opened: March 31, 1998. Capacity: 48,330. Construction Cost: About $354 million. Roof: Retractable, opens or closes in roughly 4.5 minutes. Playing Surface: Artificial turf (Shaw Sports Turf, since 2019; natural grass 1998–2018). Architect: Ellerbe Becket. Also known as: D-backs Stadium, Chase Field Arizona, and formerly Bank One Ballpark (‘The BOB’).
Chase Field Dimensions
Chase Field’s outfield is a fairly standard modern MLB shape, but with a deep, sweeping true center field. Distances from home plate: 330 feet down the left-field line, 374 feet to left-center, out to a deep left-center pocket of 413 feet, 407 feet to dead-center field, 413 feet at the deep right-center pocket, 374 feet to right-center, and 334 feet down the right-field line. The outfield wall stands 25 feet tall in center field — one of the taller center-field walls in the majors — which occasionally turns would-be home runs into off-the-wall doubles.
The park’s large foul territory is also part of its identity: roughly 80% of seats sit within the foul lines’ extended arc rather than wrapped tightly around the field, a design choice that pushed the upper deck higher than many parks built in the same era. That extra room in foul ground is also why routine pop-ups occasionally get away from infielders that would be caught in tighter ballparks.
Chase Field Seating Capacity
Chase Field’s current seating capacity is 48,330, a figure that has held since a set of renovations completed in 2023. Capacity has actually shifted several times over the ballpark’s history: it opened at roughly 48,500 seats in 1998, expanded to a peak of about 49,033 during the early-to-mid 2000s, and has been trimmed gradually since through premium-seating and berm reconfigurations.
Seating is arranged across three main levels. The 100 Level (field level) runs from Infield and Baseline Box seats near the dugouts out to the Bullpen Reserve and outfield bleacher sections. The 200 Level is the Club Level, home to the ballpark’s suites and Club Box/Club Reserve seating that wraps from the left-field corner to the right-field corner. The 300 Level is the Outfield and Infield Reserve upper deck, the highest seating tier in the park thanks to Chase Field’s extended foul territory.
Naming History: Bank One Ballpark to Chase Field
The Diamondbacks’ stadium has gone by a few names since it opened in 1998, which is why searches for ‘D-backs stadium’ or ‘Chase Field Arizona’ sometimes turn up conflicting results. It debuted as Bank One Ballpark — nicknamed ‘The BOB’ — and was renamed Chase Field in September 2005 after JPMorgan Chase acquired Bank One and its naming rights. There is only one Diamondbacks ballpark; Bank One Ballpark, Chase Field, ‘The BOB,’ and ‘D-backs Stadium’ all refer to the same building at 401 E. Jefferson Street in downtown Phoenix.
A Desert Engineering Marvel
When Chase Field opened in 1998, its retractable roof was unlike anything baseball had seen. Powered by two 200-horsepower motors, the roof takes roughly four and a half minutes to open or close, and the stadium’s HVAC system cools the interior well below the outdoor temperature by first pitch — a necessity when Phoenix summer highs routinely exceed 110°F. The roof spans enough area to cover the entire playing field plus the seating bowl, making day games and night games alike playable in climate-controlled comfort.
The field itself has evolved over the years. Natural grass served as the playing surface from the stadium’s debut through the 2018 season, before artificial turf from Shaw Sports Turf was installed ahead of 2019 — a practical response to the difficulty of maintaining live grass under a partially closed roof. A new 9,600-square-foot scoreboard, about 52% larger than its predecessor, was added ahead of the 2026 season, modernizing the fan experience while preserving the park’s distinctive character.
World Series History and Iconic Moments
Chase Field earned a permanent place in baseball lore during the 2001 World Series, hosting Games 1, 2, 6, and 7 between the Arizona Diamondbacks and the New York Yankees. The Diamondbacks won all four home games and claimed the championship in seven games, denying the Yankees a fourth consecutive title. Game 7’s walk-off hit in the bottom of the ninth inning remains one of the most dramatic finishes in World Series history.
The stadium returned to the Fall Classic in 2023, hosting Games 3, 4, and 5 between the Diamondbacks and the Texas Rangers. Beyond the World Series, Chase Field has welcomed the MLB All-Star Game in 2011 and served as a World Baseball Classic venue in 2006, 2013, and 2023, cementing its status as one of the sport’s premier destinations.
The Pool and Other Signature Features
One of Chase Field’s most beloved quirks is a swimming pool perched beyond the right-center-field fence, roughly 415 feet from home plate. It holds up to 35 guests and is available for fan groups to rent on individual game days, making it one of the most unique premium experiences in Major League Baseball — and an instantly recognizable image whenever a ball splashes down nearby.
Chase Field dimensions and seating capacity FAQs
What are Chase Field’s dimensions?
Chase Field plays 330 feet down the left-field line, 374 feet to left-center, 407 feet to center field, 374 feet to right-center, and 334 feet down the right-field line, with deep power-alley pockets reaching 413 feet. The center-field wall stands 25 feet tall.
What is Chase Field’s seating capacity?
Chase Field seats 48,330 fans as of its most recent renovation in 2023. Capacity has ranged from about 48,500 at its 1998 opening to a peak near 49,033 in the mid-2000s.
Is Chase Field the same as ‘D-backs Stadium’?
Yes. Chase Field is the official name of the Arizona Diamondbacks’ home ballpark in downtown Phoenix. It’s sometimes referred to informally as ‘D-backs Stadium,’ and was previously named Bank One Ballpark (‘The BOB’) before the 2005 renaming.
When did Chase Field open and what was it originally called?
Chase Field opened on March 31, 1998, as Bank One Ballpark — nicknamed ‘The BOB’ — for the Arizona Diamondbacks’ inaugural MLB season. It was renamed Chase Field in September 2005 after JPMorgan Chase acquired Bank One’s naming rights.
What is the swimming pool at Chase Field?
The pool sits in right-center field, about 415 feet from home plate. It can accommodate up to 35 guests and is available for rental by fan groups on individual game days.
Why does Chase Field have a retractable roof?
Phoenix’s extreme desert heat — regularly topping 110°F in summer — made open-air baseball impractical for afternoon and early-evening games. The retractable roof, paired with a powerful HVAC system, allows the stadium to be cooled well below outdoor temperatures by game time regardless of conditions outside.
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