MLB Network recently did a top 10 list regarding the best relievers right now.
On that list was Brewers pitcher Devin Williams. Williams was ranked as the third best relief pitcher in the game. He trails only Emmanuel Clase and Edwin Diaz. Former Brewer Josh Hader did not make the top 10.
( https://wisportsheroics.com/mlb-top-relievers-devin-williams-third-best/)