This was after Harvard finished last at Heps (Ivy League Championships) and then the news came out that there the school was investigating an annual tradition of the men's team ranking the women's team on their looks and creating "sexually explicit documents" around the rankings. http://www.cbsnews.com/news/harvard-investigating-report-mens-x-country-team-created-sexually-explicit-docs/
Harvard didn't issue anything on their website as to why only one guy ran and we'll look into that for the Week That Was but it is worth nothing in light of what came out this week. If they just forfeited the season because they were bad at Heps they should be criticized (seems unlikely). If they suspended a bunch of runners they should state as much because essentially they just forfeited the rest of their season like the soccer team did.