The Arizona Diamondbacks were officially awarded as a Major League Baseball expansion team on March 9, 1995, alongside the Tampa Bay Devil Rays.¹⁾

Their first-ever game was played on March 31, 1998, a 9-2 loss to the Colorado Rockies at their home stadium, then known as Bank One Ballpark.²⁾

The Diamondbacks' first win in franchise history came on April 5, 1998, in a 3-2 victory over the San Francisco Giants.³⁾

The team’s original manager was Buck Showalter, who led the team for their first four seasons from 1998 to 2000.⁴⁾

The first player to hit a home run for the Diamondbacks was third baseman Matt Williams on April 1, 1998, in a game against the Colorado Rockies.⁵⁾

The first grand slam in franchise history was hit by Travis Lee on June 28, 1998, in a game against the Florida Marlins.⁶⁾

The franchise’s first-ever no-hitter was thrown by Randy Johnson on May 18, 2004, a perfect game against the Atlanta Braves.⁷⁾

The Diamondbacks became the fastest expansion team in MLB history to win a World Series, doing so in just their fourth season of existence.⁸⁾

Luis Gonzalez’s walk-off single in Game 7 of the 2001 World Series came against Mariano Rivera, who is widely considered one of the greatest closers of all time.⁹⁾

The 2001 World Series was the first time in MLB history that the home team won every single game of a seven-game series.¹⁰⁾

Randy Johnson and Curt Schilling were named co-MVP's of the 2001 World Series, the first time two players shared the award.¹¹⁾

The Diamondbacks and Yankees combined for the latest-ever finish to a World Series game, with Gonzalez's hit concluding Game 7 at 11:43 p.m. MST on November 4, 2001.¹²⁾

Randy Johnson is the franchise's all-time leader in wins (118), strikeouts (2,077), and ERA (2.83).¹³⁾

Luis Gonzalez holds the franchise record for most career hits with 1,337 and most single-season home runs with 57 in 2001.¹⁴⁾

Paul Goldschmidt is the all-time franchise leader in home runs with 209 and RBIs with 710.¹⁵⁾

Johnson’s number 51 was the first number to be retired by the franchise on August 8, 2015.¹⁶⁾

The Diamondbacks retired the number 20 in honor of Hall of Famer Todd Helton, who never played for the team, as a tribute to the team’s late former president and general manager, Ken Kendrick.¹⁷⁾

The franchise’s first Cy Young Award winner was Randy Johnson, who won four consecutive awards from 1999 to 2002.¹⁸⁾

The Diamondbacks' first pick in the 1996 MLB Draft was right-handed pitcher Nick Bierbrodt, who was selected 26th overall.¹⁹⁾

The Diamondbacks acquired pitcher Curt Schilling in a trade with the Philadelphia Phillies in 2000, a move that would be crucial for their 2001 World Series run.²⁰⁾

The stadium, originally known as Bank One Ballpark, opened on March 31, 1998, with the inaugural Diamondbacks game.²¹⁾

It was the first stadium in the United States to feature a retractable roof and a natural grass field, though the grass was later replaced with artificial turf in 2019.²²⁾

The stadium’s swimming pool, located just beyond the right-center field fence, is a popular feature that can be rented out by groups for games.²³⁾

The retractable roof at Chase Field weighs 6,000 tons and can open or close in just four minutes.²⁴⁾

The stadium's humidor, used to store baseballs before games, was installed in 2018 to control the balls' moisture and reduce the effects of the dry desert air.²⁵⁾

In 2004, Randy Johnson struck out Jeff Bagwell to become the fourth pitcher in MLB history to reach 4,000 career strikeouts.²⁶⁾

On July 27, 2017, the Diamondbacks hit four home runs in a single inning for the first time in franchise history against the St. Louis Cardinals.²⁷⁾

Zack Greinke won a Gold Glove Award in his first season with the D-backs in 2016, becoming the third pitcher in franchise history to win the award.²⁸⁾

The Diamondbacks had a player named to the All-Star team in their inaugural season: third baseman Matt Williams.²⁹⁾

Corbin Carroll's 2023 season made him the first rookie in MLB history to record at least 25 home runs, 50 stolen bases, and 10 triples in a single season.³⁰⁾

The original logo of the Arizona Diamondbacks featured a serpent-like “A” with a baseball as a head, which was used from 1998 to 2006.³¹⁾

The team's original color scheme was purple, teal, and copper, a nod to Arizona's state mineral and desert landscape.³²⁾

In 2016, the team unveiled a new set of uniforms that included a unique gray snake pattern on the pants and sleeves.³³⁾

The Diamondbacks' mascot, D. Baxter the Bobcat, was introduced in 2000 and is known for his energetic antics and interactions with fans.³⁴⁾

The Diamondbacks were the first team in MLB history to have their logo featured on a car in a NASCAR race, with the logo appearing on a car driven by Dale Earnhardt Jr. in 2001.³⁵⁾

The team's rivalry with the Los Angeles Dodgers, often referred to as the “I-10 Rivalry,” is one of the more intense in the National League West.³⁶⁾

In 2007, the Diamondbacks became the first team to win a division title with a losing home record (46-35) and a winning road record (43-38).³⁷⁾

The franchise has a unique partnership with the Arizona Rattlers of the Indoor Football League, who also play at Chase Field.³⁸⁾

The team's foundation, the Arizona Diamondbacks Foundation, has donated over $75 million to various charities in Arizona since its inception.³⁹⁾

The Diamondbacks' first division title came in 1999, their second season of play, when they finished with a 100-62 record.⁴⁰⁾

In 2017, the Diamondbacks won the Wild Card game against the Colorado Rockies, marking their first postseason victory since 2011.⁴¹⁾

The Diamondbacks hold the record for the most home runs in a single game by a team in franchise history with eight, a feat they achieved on June 10, 2019, against the Philadelphia Phillies.⁴²⁾

The team's first Opening Day starter was Andy Benes in 1998.⁴³⁾

The Diamondbacks have made five trips to the postseason: 1999, 2001, 2002, 2007, and 2011, before their more recent runs.⁴⁴⁾

In 2001, the team's playoff slogan was “The Show,” a play on words referencing both baseball and their goal of reaching the World Series.⁴⁵⁾

The Diamondbacks' first regular-season series sweep was against the Atlanta Braves in May of 1998.⁴⁶⁾

The team’s first manager, Buck Showalter, was also a former professional football player in college at Mississippi State.⁴⁷⁾

The Diamondbacks' iconic rattlesnake logo on their uniforms was designed by the company that created the logo for the Phoenix Suns.⁴⁸⁾

The franchise’s first official broadcaster was Joe Garagiola Sr., a former major league catcher and television personality.⁴⁹⁾

The team's name, “Diamondbacks,” was chosen from a list of nearly 1,000 suggestions, beating out names like “Scorpions” and “Sand Lizards.”⁵⁰⁾

The Diamondbacks are one of only three MLB teams to have a bobcat as their mascot, with D. Baxter being a popular figure since 2000.⁵¹⁾

The team's first team captain was Matt Williams, who held the role from 1998 to 2003.⁵²⁾