Hi everyone! I'm a minecraft server expert, so I'll give you the deal of what's likely happening: The Sandlot runs on a proxy called WaterFall that lets multiple servers be connected into one. Right now, the proxy is restarting. This may mean many things, but it likely means that something caused the server to crash, and it'll be back up in around 5-10 minutes. If you have any more questions, I'll try to explain.
Actually, the server is back up and running! No need to worry, but everything should be up and running properly again shortly.