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Edwin Diaz’s slider is his most important weapon. It let him down in 2019, but he looks to turn things around with the New York Mets in 2020.
Edwin Diaz’s slider was awful in 2019. There’s no other way to describe the season. In 2019, hitters had a .622 slugging percentage and a .387 WOBA against Diaz’s slider. Compare that to 2018 when hitters had a .250 slugging percentage and a .190 WOBA.
It’s clear Diaz’s slider regressed considerably.
If Diaz is going to regain his elite form, he’ll need to regain his slider.