It is an on-field jersey. This is the special jersey the MLB players wore the weekend of the Little League World Series to promote youth baseball. The
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Ian Stewart (baseball) - Wikipedia
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Cleveland, Angels Reveal 2021 Little League Classic Uniforms: Great Lakes vs West – SportsLogos.Net News
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What's New in MLB Logos and Uniforms for 2023 – SportsLogos.Net News
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Farm Fresh: Minor leaguers on the 40-man who could knock on September's door, by Cary Osborne
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MLB series to watch week of August 21
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Matt Holliday - Wikipedia
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Rangers' Jon Gray beats Rockies with strong start vs. former team – Boulder Daily Camera
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MLB City Connect series: All 20 uniforms ranked, including the 2023 gear - The Athletic
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Baltimore Orioles: Hot Stove suggestions for left-handed bats
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USA Baseball Announces 2023 World Baseball Classic Roster
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Suddenly down a starter, Brewers welcome D-backs, adversity in wild card Wisconsin News - Bally Sports