Absolutely terrible, terrible move.
Middle of the wild card race when the team is already in the thick of it. Why do something like this that could very easily cause things to flat out implode? I understand their wild card lead has diminished in recent days but they're still tied for the lead. In my estimation, they should take three out of their four remaining series. At the Cubs will be tough but after that, they go to Cincinnati and then have Pittsburgh in Milwaukee. They wrap up the season against a Cubs team who'll have the NL Central wrapped up by then and most likely be setting up their rotation for post-season play and resting starters. However, Philly has the easier remaining schedule between the two (ATL twice, FLA, and WSH)
Don't need something as drastic as a managerial change right now.