Much like the Mets in 2018, Robert Gsellman exploded out of the gate before being something between terrible and mediocre the rest of the way. The result was an unremarkable season of relief; 80 innings of 4.28 ERA ball, with a 3.95 FIP and a lackluster 7.88 K/9. This was a marked improvement over his dreadful 2017, but hardly the step forward that many hoped to see from a pitcher who was once ranked as the 17th best prospect baseball by Baseball Prospectus.
I took a look at Gsellman back in July, trying to understand what changed after he followed up a stellar April (1.