Moylan isn't a conventional closer; he's not going to come in and blow away hitters like Rafael Soriano often did in 2009. That said, Moylan is plenty effective, and he even has the added advantage of versatility: he can come in to bail his 'pen mates out of an eighth-inning jam and then finish the game, whereas many closers struggle when they don't get to enter the game with a clean slate. He can also throw multiple innings if Bobby Cox can bring himself to let Moylan pick up a two-inning save. Should Rafael Soriano and/or Mike Gonzalez walk this winter, Moylan could get an extended look in a closing role.
Of course, making Moylan the closer removes a very valuable middle-inning option, someone that can come in and get a double-play grounder in a tight spot or give you two innings in the event of a short start. Ideally, the Braves would bring in a more traditional fireman for the ninth inning, and continue to let Moylan be the bullpen's durable utilityman.
The bottom line: Moylan's strikeout and save totals might not be eye-popping next year, but he could become the 'pen's most valuable reliever given a full season at 100% strength.