Arizona Diamondbacks
Major League Baseball franchise in Phoenix
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| June 2025 | Promoted from Amarillo to Reno Aces in early June. |
| 2025 | Assigned to Arizona's Spring Breakout roster during spring training. |
| 2025 | After spring training, assigned to the Hillsboro Hops to make his professional baseball debut. |
| 2025 | The Arizona Diamondbacks continue to maintain a consistent minor league affiliate structure across multiple developmental levels, including teams in Reno, Amarillo, Hillsboro, Visalia, and international developmental leagues. |
| May 22 2025 | Optioned back to Triple-A Reno Aces without making an appearance with the Arizona Diamondbacks. |
| May 16 2025 | Selected to the 40-man roster and promoted to the major leagues for the first time. |
| 2025 | Diamondbacks released a second 'City Connect' uniform that pays tribute to the team's history, featuring design elements from various uniform combinations since 1998, including Heritage Pinstripes, a snakeskin pattern, and references to their 2001 World Series-winning team. |
| May 2025 | Promoted from Hillsboro Hops to Amarillo Sod Poodles in late May. |
| 2025 | Optioned to Triple-A Reno to begin the season. |
| 2025 | Optioned to Double-A Amarillo to begin the season. |
| 2024 | Selected by the Arizona Diamondbacks in the third round of the Major League Baseball draft, signing for $650,000. |
| 2024 | As a junior at Presbyterian College, Eagen starts 14 games, achieving a 6-2 record with a 2.67 ERA and 121 strikeouts over 77 2/3 innings. |
| 2024 | The Arizona Coyotes were deactivated and transferred their entire roster and staff to the newly formed Utah Hockey Club. |
| 2024 | Ketel Marte won the Silver Slugger Award for second basemen, highlighting his exceptional batting achievements. |
| 2024 | Christian Walker wins his third Gold Glove Award, establishing himself as a premier defensive first baseman in Major League Baseball. |
| 2024 | Arizona Diamondbacks unveiled refreshed uniform designs, featuring the return of turquoise as a full-time accent color alongside Sedona red and black, while removing sand color except for the 'City Connect' uniform. |
| 2024 | Arizona Diamondbacks continued their minor league affiliate structure, consolidating back to one ACL D-backs team while maintaining their other affiliate teams at Reno Aces, Amarillo Sod Poodles, Hillsboro Hops, Visalia Rawhide, and two DSL Arizona teams. |
| 2024 | ACL D-backs established in the Arizona Complex League. |
| 2024 | Zac Gallen won the Opening Day game against the Colorado Rockies at Chase Field. |
| 2024 | Split the season between Double-A Amarillo and Triple-A Reno Aces, achieving a .279/.349/.519 batting line with 31 home runs, 90 RBI, and 14 stolen bases. |
| 2024 | Invited to spring training with the Arizona Diamondbacks for the first time in his career. |
| 2024 | Joined the Glendale Desert Dogs of the Arizona Fall League at the end of the regular season. |
| 2024 | Promoted from the Arizona Complex League Diamondbacks to the Visalia Rawhide, advancing in the Diamondbacks minor league organization. |
| November 19 2024 | Added to the Diamondbacks' 40-man roster to protect him from the Rule 5 draft. |
| September 2024 | Named the Diamondbacks Minor League Pitcher of the Month. |
| July 30 2024 | Arizona Diamondbacks tied their team record of 22 hits in a game against the Washington Nationals |
| July 23 2024 | Signed with the Arizona Diamondbacks after being selected 35th in the MLB draft, receiving an under-slot signing bonus of $2,150,000. |
| June 2024 | Promoted from Hillsboro to the Amarillo Sod Poodles in mid-June. |
| February 15 2024 | Signed free agent Andrew Chafin. |
| January 11 2024 | Re-signed free agent Zach Davies. |
| January 5 2024 | Signed free agent Evan Longoria. |
| 2023 | Played with Hillsboro Hops, starting 24 games and achieving a 7-4 record with a 4.00 ERA and 124 strikeouts over 117 innings. |
| 2023 | Set a team record with 166 stolen bases in a single season. |
| 2023 | Diamondbacks clinched the NL Wild Card berth and defeated the Milwaukee Brewers in the National League Wild Card Series. |
| 2023 | Christian Walker wins his second consecutive Gold Glove Award, continuing the Diamondbacks' tradition of excellent first base defense. |
| 2023 | Gabriel Moreno won the Gold Glove Award for catchers, recognizing his exceptional defensive skills in his position with the Arizona Diamondbacks. |
| 2023 | Corbin Carroll won the National League Rookie of the Year Award, recognizing his outstanding performance in his first full season with the Arizona Diamondbacks. |
| 2023 | The team promoted the alternate white uniform with teal accents to its primary home uniform, retiring the previous Sedona Red white uniform, in compliance with a new Nike rule limiting teams to four regular uniforms plus the 'City Connect' uniform. |
| 2023 | Arizona Diamondbacks completed their 2023 Major League Baseball season, competing in the National League West division. |
| 2023 | Arizona Diamondbacks maintained their minor league affiliate structure, with a slight change in DSL team naming from DSL D-backs to DSL Arizona (Black and Red). |
| 2023 | Zac Gallen starts Opening Day against the Los Angeles Dodgers at Dodger Stadium, experiencing a loss. |
| 2023 | The Diamondbacks win the National League Championship Series and reach the playoffs. |
| 2023 | Returned to Amarillo Sod Poodles, playing 116 games and hitting .256/.338/.461 with 22 home runs, 75 RBI, and 11 stolen bases. |
| 2023 | Assigned to Reno and also played for Amarillo. Pitched 42 relief appearances with a 1-6 record, 9.20 ERA, 46 walks, and 58 strikeouts over 44 innings. |
| 2023 | Began the season with the High-A Hillsboro Hops, being the youngest player on the roster. |
| 2023 | Played for Visalia and Single-A Hillsboro Hops, making 24 starts with a 4-9 record, 3.75 ERA, and 97 strikeouts over 115 1/3 innings. |
| 2023 | Signed with the Arizona Diamondbacks and began playing for the Arizona Complex League Diamondbacks and Visalia Rawhide in his first professional season. |
| 2023 | Drafted by the Arizona Diamondbacks in the ninth round of the Major League Baseball draft. |
| December 23 2023 | Traded Daulton Varsho to the Toronto Blue Jays, receiving Lourdes Gurriel Jr. and Gabriel Moreno in return. |
| December 15 2023 | Signed free agent Scott McGough. |
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This contents of the box above is based on material from the Wikipedia articles Professional sports teams in Arizona, 2023 Arizona Diamondbacks season, List of Arizona Diamondbacks team records, List of Arizona Diamondbacks minor league affiliates, Arizona Diamondbacks, List of Arizona Diamondbacks Opening Day starting pitchers & Arizona Diamondbacks minor league players, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.