Every MLB season, several managers find themselves on the hot seat heading into the second half of the year.
They can get into that position in several different ways. Poor team performance, a differing mindset from ownership or even a bad relationship with players can all lead to a manager being fired.
Here is a look at five managers on the hot seat as the MLB season heads into its second half.
Houston Astros manager Brad Mills is very likely to be fired at the end of the 2012 season. According to Mike Axisa at MLB Trade Rumors, Mills was hired under different ownership prior to the 2010 season.
His first tenure as a big-league manager has not gone very well. He has led the Astros to a 164-243 record and the worst record in the big leagues a year ago.
With the Astros moving to the American League next season, they will probably want to hire a manager with more experience in that league.
To say that the Colorado Rockies have had a disappointing season in 2012 would be a huge understatement.
While they do have a good offense, their pitching has been terrible in both the rotation and the bullpen. Their team leader in ERA is currently sitting at 6.14 and the most wins by one pitcher is five.
With a 34-53 record and 13.5 games back, it looks like the Rockies' season is already over. Manager Jim Tracy is definitely on the hot seat. His questionable decision to go to a four-man rotation and limit each starter to 75 pitches is just one sign that Tracy is in over his head.
The Miami Marlins had huge expectations heading into the 2012 season. They were opening a new stadium, introducing a new name and spent a ton of money bringing in big-name free agents.
However, things have not gone very well for the Ozzie Guillen-led team. They have struggled mightily in pitching and even worse on offense.They are ranked 21st or worse in the MLB in ERA, WHIP, BAA, runs, batting average, OBP and slugging percentage.
While the team's struggles cannot be solely blamed on Guillen, he has the target on his back. It would not be a surprise to see Miami part ways with the fiery manager at the end of this season.
The Philadelphia Phillies are currently 38-51 and 14 games back in their division. With the talent of the other teams in their division, it doesn't seem likely that the Phillies can mount any sort of comeback.
If the division-leading Washington Nationals play .500 baseball the rest of the way through the season, the Phillies would have to win over 50 of their remaining games to catch up.
Stats-wise, the Phillies have been mediocre in 2012. They haven't done any one thing spectacularly good or bad. They have also been hurt by injuries to key players such as Roy Halladay, Chase Utley and Ryan Howard.
While he has had an amazing career as an MLB manager, it might be time for Charlie Manuel to finally call it a career.