6) Jake Diekman
The 2024 Mets were remembered for a lot of good, but there was plenty of bad in there as well. Among the bad offseason additions was Jake Diekman. A veteran lefty who had been as up-and-down from year to year as anyone in baseball, the Mets were banking on his strong finish with the Tampa Bay Rays in 2023 being more of what they got than the way he performed with the Chicago White Sox to begin that same season. His 10 earned runs in 11.1 innings versus 11 earned runs in 45.1 innings are a complete contrast.
The Mets ended up with someone in between leaning a little too far close to the White Sox performance. Diekman was pretty unhittable, allowing 6.5 hits per 9.. Walks were his issue with 6.8 per 9. Then came the home runs. He had 7 hit against him in 32 innings.
It became practically automatic that Diekman would give up a run each time he stepped on the mound. A 6.75 ERA in June and 10.80 ERA in July sealed his fate. His big strikeout against Aaron Judge would be his positive claim to fame. The negatives were far too plentiful (and painful) to recall each one.