September 24, 1984: Cubs clinch first postseason berth since 1945 behind Sandberg, Matthews, Sutcliffe – Society for American Baseball Research

Cubs clinch 1984 NL East, 09/24/1984

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CHC@PIT: Sutcliffe seals it, Cubs clinch 1984 NL East

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Cubs 1984 NL East Championship Celebration

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TBT: 1984 Cubs clinch first crown in 39 years

October 2, 1984: Cubs crush Padres in their first postseason game in 39 years – Society for American Baseball Research

⚾️On September 24, 1984 the Cubs clinch the National League East flag with a 4-2 victory over Pittsburgh at Three Rivers Stadium. Rick Suttcliffe's, By Davenport Sports Network

October 3, 1984: Steve Trout's solid performance puts Cubs one win away from World Series – Society for American Baseball Research

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