Loss to San Diego 18-6?? What the???

This is the team that took 2 of 3 from the Yanks, and swept the Phillies (just last week!). Not just swept them, SHUT THEM OUT completely. 27 scoreless innings. The team that has plagued us, that has taken the season away from us in the last week of the season, repeatedly. Now, against a team with one big name player, that averages only 4 runs per game, a light hitting team, shall we say, our Metropolitans get SHEEEE-LACKED 18-6. What the???!!!