The "coach" of the subtitle is J.T. Curtis and "his team" is the Patriots of John Curtis Christian School -- and that the coach's name is the same as the school's is no coincidence.
About the book, from Thompson's website:
Just a few nights [before Katrina hit], the Patriots of John Curtis Christian School compete in their final pre-season game, focused on an impending run for a record twentieth Louisiana state football championship. A team from a small, private school of modest means, which had improbably become a New Orleans football powerhouse under the guidance of legendary coach (and son of the school's founder) J.T. Curtis, the Patriots were unsure how their season would progress, with inexperienced new starters at several key positions. They were concerned but optimistic, certain that their team would come together and succeed as they always had.
Then Katrina hit. And with it, their lives were changed forever.
Thompson graciously answered my questions about his book and writing: read all about it at Author Interviews.