The Milwaukee Brewers are shopping left-handed relief pitcher Josh Hader, according to Ken Rosenthal of The Athletic.

Rosenthal notes the New York Mets as one team to potentially watch in trade discussions, although it is not known if the Brewers have actually held talks with the Mets about Hader.

Hader is coming off a dominant 2019 campaign in which he appeared in 61 games and went 3-5 with a 2.62 ERA, allowing just 41 hits while fanning 138 hitters over 75 2/3 innings of work en route to an All-Star appearance. He also racked up 37 saves.

It represented the second straight spectacular season for the 25-year-old, as he pitched to the tune of a 2.43 ERA through 55 relief outings in 2018, surrendering a mere 36 hits while registering 143 punchouts across 81 1/3 frames, making his first All-Star team in the process.

Hader was originally selected by the Baltimore Orioles in the 19th round of the 2012 MLB Draft but never actually played a game for the Orioles before being traded to the Houston Astros in July 2013.

The Astros then dealt him to the Brewers two years later.

Hader made his big-league debut in 2017, going 2-3 with a 2.08 ERA over 35 appearances out of the bullpen. In 47 2/3 innings, he gave up 25 hits while striking out 68 batters.

The Millersville, Md. native is projected to earn $4.6 million in his first year of arbitration going into 2020. Coupled with his supreme talent, that makes Hader an incredibly attractive trade piece, and one that Milwaukee may want to cash in on sooner rather than later.

In a free-agent market dominated by starting pitching, Hader could be one of the most sought-after trade chips in baseball this winter.