Interesting links. It still seems less clear-cut than for women. For one thing, one of the articles you linked said...
The report suggests that socioeconomic, ethnic and/or dietary factors may also influence how age affects human sperm quality. If you hypothesize a Lazurus Long, it's a short step to say that they must have some X factor that corrects what are normally increasing genetic errors from cell division as the person ages. But such a hypothesis does not get around the ova problem for a hypothetical woman who is long lived.