Adrian David Houser (born February 2, 1993) is an American professional baseball pitcher for the Texas Rangers organization.

He has previously played in Major League Baseball (MLB) for the Milwaukee Brewers and New York Mets.

[1] Houser signed a contract with Houston three days after he was drafted and was subsequently assigned to the Rookie-level Gulf Coast League (GCL) Astros.

[6] On July 30, 2015, the Astros traded Houser, along with Brett Phillips, Domingo Santana and Josh Hader, to the Milwaukee Brewers for Carlos Gómez and Mike Fiers.

Houser was recalled to the Brewers' major league roster on June 17, 2018, and pitched the team's game against the Philadelphia Phillies later that day.

[11] On August 11, 2019, in a game against the Texas Rangers, Houser misfielded a ground ball hit at him by Elvis Andrus.

[14] On April 27, 2021, Houser hit his first major league home run off of Daniel Castano of the Miami Marlins.

On December 20, 2023, the Brewers traded Houser and Tyrone Taylor to the New York Mets in exchange for Coleman Crow.

[28] Houser is the nephew of James Knott, a pitcher who was selected by the New York Mets in the 11th round of the 1992 MLB Draft.

He is close friends with fellow Cherokee Nation member and MLB pitcher Ryan Helsley.