There’s a certain know-it-when-you-see-it moment when a baseball team goes from underperforming to checked out, from disappointing to joylessly headed nowhere.The Seattle Mariners seem to have reached that point.Their 22-0 loss to the Milwaukee Brewers on Tuesday, Aug. 18 had it all: Managerial malfeasance, an embarrassing gaffe by a superstar and, in the end, an utter lack of fight that belies the fact the Mariners are actually in the playoff hunt.Let’s be clear: That doesn’t mean they’re a good team.The Mariners are 59-67, have been outscored by 45 runs and have a 60-homer superstar batting .157 — nearly 50 points…