Defeat seemed unavoidable. The Mariners were trending toward another four-game losing streak for the third time in their first 36 games.  They failed to take advantage of Atlanta’s rookie starter JR Ritchie loading the bases with two outs in the fifth inning on a hit batter and a pair of walks when a perhaps overeager Josh Naylor grounded out to first base.   That frustration multiplied when Logan Gilbert served up three solo homers in the top of the sixth as the Braves turned their one-run lead into four. You could almost hear manager Dan Wilson saying, “Tough one tonight” postgame.  But that all changed in the bottom of the sixth.  Luke Raley crushed a three-run homer off Ritchie, ending the Bainbridge Island native’s outing and giving the Mariners life.  J.P. Crawford gave the Mariners a lead they wouldn’t lose, smashing a two-run homer off reliever Tyler Kinley.  Seattle’s bullpen, now missing Gabe Speier along with Matt Brash, closed out the 5-4 victory.  Jose A.…