Adrian David Houser was born on February 2, 1993, in Tahlequah, Oklahoma. He is a pitcher in the MLB.
Houser was drafted by the Houston Astros in the second round of the 2011 MLB Draft out of Locust Grove High School. He had committed to play college baseball at the University of Oklahoma, but chose to sign with the Astros rather than attend college.
Houser made his professional debut that year with the Greeneville Astros and Gulf Coast Astros. In 12 games (11 starts) between the two teams, he was 2-4 with a 4.31 ERA.
Houser spent 2012 with Greeneville where he was 3-4 with a 4.19 ERA in 11 starts, 2013 with the Tri-City ValleyCats where he pitched to an 0-4 record and a 3.42 ERA in 14 games (nine starts), and 2014 with the Quad Cities River Bandits where he went 5-6 with a 4.14 ERA in 25 games, 17 being starts. He started 2015 with the Lancaster JetHawks and was promoted to the Corpus Christi Hooks.
On July 30, 2015, Houser, along with Brett Phillips, Domingo Santana and Josh Hader, were traded to the Milwaukee Brewers for Carlos Gómez and Mike Fiers. Milwaukee assigned him to the Biloxi Shuckers. In 26 games (20 starts) between Lancaster, Corpus Christi and Biloxi, he compiled a 7-5 record with a 4.43 ERA.
Houser was promoted to Milwaukee for the annual September call-ups. He made his major league debut on September 26, 2015. In 2016, Houser spent all of the season with Biloxi, going 3-7 with a 5.25 ERA in 13 starts. Houser's 2017 season was limited due to injury, and he pitched only 17.2 innings all season. He began 2018 with Biloxi. Houser was recalled to the Brewers' major league roster on June 17, 2018, and pitched during the team's game against the Philadelphia Phillies later that day.
In 2019 for Milwaukee, Houser appeared in 35 games, pitching to a 6-7 record and a 3.72 ERA with 117 strikeouts in 111.1 innings pitched. In 2020, Houser recorded a 5.30 ERA and 1-6 record with 44 strikeouts in 56.0 innings of work across 12 games.
On April 27, 2021, Houser hit his first major league home run off of Daniel Castano of the Miami Marlins. In a game against the Marlins on May 8, Houser hit his second career home run, also off of Castano.
On November 18, 2022, Houser signed a one-year, $3.6 million contract with the Brewers, avoiding arbitration.