As of now, the Mets look to go into Spring Training with only one left-handed relief pitcher, Justin Wilson, with the rest of the pen composed of righties.
Having a good left-handed specialist is important for any contending team, especially in the NL East, as the Mets have to play left-handed power bats like Freddie Freeman, Bryce Harper, and Juan Soto on a regular basis.
Zamora has already had some big league experience, having first been called up in late 2018, where he logged a 3.00 ERA over 16 appearances. He was called up again in 2019 as an injury replacement, however, to varied success. He ended the year with 5.19 ERA as a member of the Mets.
He did perform better with Triple-A Syracuse and currently in the Dominican Winter League, has a 1.93 ERA in 10 outings for what that’s worth.
Additionally, despite his mixed ERA, he has a high strikeout rate in his MLB career, averaging 12.3 Ks per 9 innings. This hopefully shows some promise of better days ahead.
It is highly unlikely that the Mets will last the entire season relying on just one southpaw out of the bullpen. If they need another one, Zamora should definitely be in the mix, and with a strong showing in Spring Training, could force his way into their plans.