My wife is an adjunct faculty member for Western Governor's University (WGU - the commercials with the owls). She basically grades papers from home part time, completely remote. They have all sorts of programs, but you need at least a masters to do it. She has a masters in physical science education, so she grades papers for the education and phys/chem/bio departments. They also have "mentor" positions where you are the instructor. They don't grade assignments, but have to create the rubrics that my wife uses.
Other than that, you can live anywhere in the US. Other online universities may have similar options (University of Phoenix, SNHU...). As a former sports writer, you might be able to find something in a journalism or other language arts department.