Meant to be Bayern Munich.
I started by using this
Calgary official tartan, which I assume is where you are coming from, but it was kind of too dark/detailed to see. So I picked one off of wikipedia that looked ok to me as a layperson :0 I turned it sideways to make a sort of infield.
I bet somewhere on this board someone has made these
plaid/tartan New York Giants uniforms
* edit, it was easy to make a second version with the actual Calgary tartan