The Reds fired their longtime manager David Bell after six seasons, following a 2-0 loss to the Pittsburgh Pirates on Sunday.
The Reds will miss the playoffs for a fourth straight year and the fifth time in Bell's six seasons, extending their postseason drought.
Reds president Nick Krall cited a need for change to move the team forward, as they haven't achieved expected success and must focus on 2025.
Bell, 52, was hired in 2019, leading the franchise to the playoffs in 2020, but was knocked out in the wild-card round, marking the only postseason berth in over a decade.
Bell finished with a 409-455 career record as the Reds' manager, with only one postseason berth in 2020, and a winning percentage below .500.
Bell's best campaign was an 83-79 finish in 2021, but the Reds still missed the playoffs that year, highlighting the team's struggles.
The Reds are fourth in the NL Central, 13.5 games back from the Milwaukee Brewers, who clinched the division last week, making a playoff push impossible.
The Reds will wrap up the regular season with a two-game series against the Cleveland Guardians and a three-game run against the Chicago Cubs, under interim manager Freddie Benavides.