DeForest Buckner didn't expect trade from San Francisco 49ers
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49ers' Arik Armstead 'Shocked' After DeForest Buckner Trade
49ers keep Armstead, reportedly trade Buckner to Colts
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49ers pick up Arik Armstead's 5th-year option for 2019
Middlekauff: Why the 49ers should focus on defense early, plus Raiders notes - The Athletic
Why 49ers decided to trade DeForest Buckner, re-sign Arik Armstead – NBC Sports Bay Area & California
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2020 NFL free agency - Grades for every big signing and trade - ESPN
DeForest Buckner learned harsh NFL business realities with 49ers trade – NBC Sports Bay Area & California