MIAMI — The Miami Marlins’ downfall on Saturday began in the fourth inning. They had a runner on third base with one out against the Atlanta Braves, a prime chance to break open the scoreless deadlock. Instead, a pair of poor decisions resulted in two outs on the basepaths on the same play. The Braves took advantage from there, scoring in each of the next three innings to beat the Marlins, 4-3, at loanDepot park for Miami’s third consecutive loss. The Marlins are 17-22, while the Braves improved to 19-21. We’ll get to the scoring in a moment, but first … the fourth-inning baserunning. Jesus …