Major League Baseball will have about 10,000 employees partake in a vast and unique study on the viability of COVID-19 antibody testing, multiple league sources confirmed to CBS Sports. The study, which will not affect any timeline for a potential start of the 2020 MLB regular season, will include participants from 27 of the league's 30 teams and help determine whether test subjects have been infected with COVID-19 even if they never presented symptoms. The tests, which were distributed at each participating team's ballpark, were available on a voluntary basis. The team's medical personnel had to know an individual was...