It seems as though over the past 10 years or so, baseball is just littered with these closers who come out of nowhere, firing bullets. And for a 2-5 year period in which they put everything they have into every pitch, they're absolutely dominant. And then they break. When they're on, they're on. When they're off, they don't tend to come back. When they do manage to make it back, it's because they learned some new tricks from the junkballers. For every Papelbon, Wagner, and Rivera who can do it for years, there's a handful of, off the top of my head: Eric Gagne Brian Wilson Chad Cordero Billy Koch Joe Borowski Carlos Marmol Brad Lidge Dan Kolb Kevin Gregg Derrick Turnbow Fernando Salas Joel Zumaya Chad Cordero Bobby Jenks ...and of course, John Rocker. And they always seem to hang on long enough for that big payday. Maybe it's too soon to lump Johnny Venters, Jason Motte, and Chris Perez in with this lot, but they're close. My point is that if someone like this is available for nothing, sure, why not. But if there's already a line forming, it's not worth the risk.