Host selection The Seattle Mariners were awarded the game on September 14, 2021. This was the third time that the Mariners hosted an All-Star Game; the previous games were in
1979 at the
Kingdome and
2001 at
Safeco Field, which was renamed T-Mobile Park before the
2019 season. To prepare for the All-Star Game and other events, a
ride-hailing lot was added to T-Mobile Park in June 2023 and repairs to escalators at
International District/Chinatown station were also completed.
Sound Transit, the regional transit operator, increased the frequency of
Link light rail trains on the
1 Line and ran special event
Sounder commuter trains for the Home Run Derby and All-Star Game. Service on the
West Seattle Water Taxi was extended on event days. Fares on Sound Transit,
King County Metro, and
Kitsap Transit services, including buses and ferries, were also waived on July 10 and 11.
Roster selections The starting rosters for each league's position players plus
designated hitter (DH) were determined by fan balloting, which was conducted in two phases. Since 2022, the first-phase top vote-getter for each league automatically received a spot in the starting lineup. The top two vote-getters for every other non-pitching position and DH advanced to the second phase of voting. There are normally six finalists for the three outfield positions in each league, except when an outfielder is the top vote-getter, in which case there are four finalists for the remaining two outfield positions. Voting does not carry over between phases. First phase voting was held from May 1 through June 22, and second phase voting was held from June 26 through June 29. All voting was conducted online, at
MLB.com or via the MLB
app. Starting players, as selected via voting, were announced on June 29. Reserve position players and all pitchers—selected "via 'Player Ballot' choices and selections made by the Commissioner’s Office"—were announced on July 2. The leading vote getter in each league during phase one was
Shohei Ohtani of the
Los Angeles Angels and
Ronald Acuña Jr. of the
Atlanta Braves. Acuña received the most votes during phase one.
Logo and uniforms The 2023 All-Star Game logo featured imagery that symbolized the
Pacific Northwest, incorporating silhouettes of
Mount Rainier, the
Space Needle, and
evergreen trees. The yellow compass between the words "ALL" and "STAR" pointed to the northwest as an allusion to Seattle's location, and the five corners were a nod to the five-state region of the Pacific Northwest. The branding is based on the Mariners' current colors of navy blue, northwest green, and silver. The uniforms for the game featured
Nike's
new Vapor Premier template which will be rolled out in every Major League uniform beginning in 2024. The American League wore predominantly northwest green tops with white pants, while the National League wore predominantly navy blue tops and pants; both uniforms sported "AMERICAN" and "NATIONAL" instead of each player's team wordmarks. Caps provided by the
New Era Cap Company were mint with the team logos in navy blue and white, and the All-Star logo on the right side. ==Rosters==