Cubs Plan to Release Jason Heyward From Final Year of Deal - Sports Illustrated
Jason Heyward remains the best option for the Cardinals
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Jason Heyward - Wikipedia
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Letters from Camp: Jason Heyward breaks down what's going on with free agency - The Athletic
The Rundown: Heyward Contract Shouldn't Prevent Cubs from Spending, Bellinger Potential Could Outweigh Risk, Collusion Investigation in NY - Cubs Insider