The Phillies all-burgundy jerseys had zippers

The long and storied history of MLB teams taking the field in blue uniforms - ESPN

MLB Jersey & Cap History

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Here's an Awful Change That's Coming to Phillies Jerseys

Uni Watch's Flashback -- The rise and fall of MLB zippers - ESPN

Matt Breen on X: Next Saturday, the Phillies will wear these all-burgundy uniforms they wore for one night in 1979. Yes, they have zippers instead of buttons. Braves will also wear throwbacks.

The Phillies wore their horrendous Saturday Night Special uniforms and got the same crappy result as 40 years ago – New York Daily News

MLB Jersey & Cap History

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The Phillies wore their horrendous Saturday Night Special uniforms and got the same crappy result as 40 years ago – New York Daily News

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Uni Watch's Flashback -- The rise and fall of MLB zippers - ESPN