“Let’s [expletive deleted] GO!” Kyle Finnegan screamed after Lane Thomas leapt at the right field wall in American Family Field and brought down a potential game-tying (if a double) or game-winning (if it went out, though it didn’t look like it, short of a Canseco-ish play) fly ball by Milwaukee Brewers’ third baseman Joey Ortiz for the last out of Washington’s comeback win on Saturday afternoon. There was a runner on second. It was 6-5 Nationals. The visitors battled back after starter Mitchell Parker gave up five runs on three hits and two walks in just 2⁄3 of an inning, leaving 8 1⁄3 innings for the bullpen to cover.