Nick Markakis becomes first MLB player to return from COVID-19 opt-out
Braves OF Markakis goes on IL, possible COVID-19 exposure - The San Diego Union-Tribune
Nick Markakis Retires Without Ever Reaching The World Series
Nick Markakis announces retirement - MLB Daily Dish
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Disrupted by delays
Nick Markakis opts out of the 2020 season with Braves
Major League Baseball to Make Coronavirus-Delayed Debut
Cardinals closer Jordan Hicks latest MLB player to opt out of 2020 season
Atlanta Braves Lose Lethal Lefty Punch As Nick Markakis Follows Freddie Freeman To Sidelines
Welcome back, fans! MLB openers bring Juan Soto, Fernando Tatis Jr. and crowds. – The Denver Post