15. Nick Markakis
Markakis decided to opt out after a phone call with close friend and teammate Freddie Freeman. Freeman tested positive and explained the intensity of the symptoms to Markakis. In the end, the 36-year-old Atlanta Braves veteran decided it wasn’t worth playing.

The outfielder says that Freeman’s description of his illness was eye-opening. Furthermore, Markakis doesn’t like the idea of playing without fans in attendance. Manager Brian Snitker says that he respects Markakis’s decision but it is a blow to their hopes of winning a third straight NL East title.