The New York Mets bullpen in 2019 was one of the worst in the entire MLB. Outside of Seth Lugo and Justin Wilson, no Mets relief pitcher has an ERA under 4.50 with at least 10 innings pitched. Given the bullpen at the start of the season, this is rather shocking due to the big names brought in to help solidify the back end of the bullpen.
The man who was brought in to save games, Edwin Diaz, has been disappointing to put it nicely. In 61 games this year, Diaz has a 5.