Is there a way to add data into a data store from a textfield based form?
for example:
Name:______
Team:______
Number:_____
Age:_______
when submitted injects into the data store?
You can use form.updateRecord() and then store.add(record).
But what you should really do is look at the examples that ship with ExtJS. There are lots of great ideas on how to do most things you need.