Commanders to unveil black alternate uniforms against Cowboys
The San Francisco 49ers will be wearing a black alt this season – SportsLogos.Net News
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Arizona Cardinals unveil new uniforms for the 2023 season
NFL Week 4 Uniforms: Black Helmets for Saints & Commanders, Throwbacks for Giants, 49ers + More – SportsLogos.Net News
Cardinals wasting time in alternate uniforms, should get rid of them
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49ers' First-Ever Alternate Uniform Features Black Jerseys, Black Pants
Source: 49ers to introduce new alternate uniform for 2018 - Niners Nation