Nick Markakis, an Atlanta Braves outfielder, opts out of the 60-game MLB season – The Virginian-Pilot
Braves OF Markakis opts out of 2020 season
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Atlanta Braves Nick Markakis Opts Out - Last Word On Baseball
Nick Markakis opts out of 2020 season - Lone Star Ball
Markakis retires after 15 years with Braves, Orioles - The Sumter Item
Braves place Albies, Adams on IL, reinstate Markakis