MLB teams that improved dramatically after firing manager midseason?

[SetBuilder]

"Trader" Jack McKeon. Took over the struggling but enormously talented Marlins team in 2003. The club started the season just 16-22 under Jeff Torborg before McKeon took over on May 11. The rest, of course, was history.

[Topps206]

The Phillies fired Pat Corrales with one game above .500 in 1983 and Paul Owens put himself in the dugout. They won the pennant that year.

[rats60]

Originally Posted by Topps206

The Phillies fired Pat Corrales with one game above .500 in 1983 and Paul Owens put himself in the dugout. They won the pennant that year.

The only problem is the Phillies were already tied for 1st place when Owens took over. They improved, but I wouldn't call tied for 1st to finishing 1st a dramatic improvement.