Aaron Ashby was born on May 24, 1998, in Milwaukee, Wisconsin, and is a Major League Baseball pitcher for the Milwaukee Brewers.
He was drafted in the fourth round of the 2018 Major League Baseball draft by the Milwaukee Brewers. From Crowder College, the Milwaukee Brewers selected Ashby in the fourth round, 125th overall, of the 2018 Major League Baseball draft.
He pitched for the Rookie-level Helena Brewers and the Single-A Wisconsin Timber Rattlers, going 2–3 with a 3.59 ERA in 13 games. In 24 appearances for the Wisconsin Badgers and the High-A Carolina Mudcats in 2019, Ashby was 5–10 with a 3.50 ERA.
Ashby did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic. He was assigned to the Triple-A Nashville Sounds to begin the 2021 season. Ashby was shifted to the bullpen in June and recorded a 4–1 record and 4.50 ERA in 12 games for the team.
On June 29, 2021, the Brewers announced that they would promote Ashby to the major leagues for the first time. He was formally selected to the 40-man and active rosters the on June 30. He made his MLB debut that day as the starting pitcher against the Chicago Cubs.
In his debut, he went 2⁄3 of an inning and allowed 7 runs, 4 earned. At the end of his 1st season, he played in 13 games, 4 in which he started, and he put up a record of 3-2, with an ERA of 4.55 and 39 strikeouts in 31.2 innings.
Ashby has never divulged any information about his parents, he is a very private person who likes to keep his personal life away from media attention.