Two teams on countdowns to milestones -- one negative and one positive -- open a three-game series Friday night when the Miami Marlins visit the San Francisco Giants. Both clubs have struggled to start the week, with the Marlins losing four straight to the Milwaukee Brewers to cap a 1-6 homestand, while the Giants were losing three of four to the Pittsburgh Pirates to open a seven-game run at home. The losing streak has dropped the Marlins (51-95) within five defeats of their first 100-loss season since 2013 with 16 games remaining.