Richmond, Va. ? Imprisoned quarterback Michael Vick filed for bankruptcy protection while serving time for federal dogfighting charges, saying he owes between $10 million and $50 million to creditors.

Vick filed Chapter 11 papers in U.S. Bankruptcy Court in Newport News on Monday. The seven largest creditors listed in the court papers are owed a total of about $12.8 million.

Vick is serving a 23-month prison sentence at the U.S. Penitentiary in Leavenworth after pleading guilty last year to bankrolling a dogfighting ring.