The Brewers, with the worst record in the major leagues, dismissed Roenicke on Sunday night and said they would announce his replacement Monday morning. The Brewers suffered an epic collapse last season, and their 7-18 start this season means they have won 16 of their last 56 games.
"It's all about wins and losses," General Manager Doug Melvin said in a statement, "and after the first month of play this year we didn't see the progress and improvement we had hoped for."
When the Angels hired Mike Scioscia as manager, he appointed Roenicke to his coaching staff. Roenicke coached under Scioscia for 11 years before the Brewers hired him as manager.
In 2011, Roenicke's first season, the Brewers won their first division championship since 1982. They came within two victories of the World Series, losing the National League Championship Series to the St. Louis Cardinals in six games.
The Brewers have not finished higher than third place since then. They led the NL Central by as many as 6 1/2 games last season -- on July 1 -- and led the division as late as Aug. 31 before finishing eight games out of first place.