In the day of 1,000,000 man bullpens and SP who can't go more than 100 pitches, there really is no place for a guy whose main role is PR (unless it's the playoffs), but even then, Santana isn't exactly Billy Hamilton or even Aaron Hicks on the base paths. I think Santana ultimately is just AAAA type depth, he can fill in for a week or two if your 2B or SS gets injured, he can step in during that time and be the Util bench guy. It wouldn't shock me to see him "play" in the majors for another 4-5 years, but it also wouldn't shock me if with that he never saw more than 120 at bats a year as well.