The Atlanta Braves dropped the series finale to the Seattle Mariners, 3-1, Wednesday afternoon. The loss hands them their first series loss of the season.  After allowing a run in the bottom of the third and then the bottom of the sixth to fall behind 2-0, the Braves were able to cut the lead in half in the top of the eighth on a sac-fly by Dominic Smith.  However, they saw the rally cut short after Jorge Mateo was picked off of first base, followed by Drake Baldwin getting stranded at first base. The Mariners tacked on an insurance run in the bottom of the eighth to reach the final score.  They won 10 of the first 11 series of the year, splitting the one they didn’t with the Arizona Diamondbacks in early April. It was the first time in franchise history that they went this deep into the season, in respect to the number of series played, without losing a series. "It's gonna happen," Martin Pérez said. "This is baseball.…