HOF closer Dennis Eckersley was a mediocre starter who fell into that role...more recently, Mark Melancon became an All-Star reliever for the first time the next year after posting a 6.20 ERA also in a relief role.  ERA is actually a pretty lousy predictor of who is closer material and who isn't--having a 100-mph fastball and the willingness to do it, are points in Estevez' favor.  Bud Black once broached the idea of experimenting with Senzatela in a closer or set-up role, so I guess he's insane?  That's where I got the idea from.  Again...willingness and mental toughness are more important in that role than ERA.  I wouldn't mind having Holland back, I just don't get the feeling he wants to come back. And good luck luring a free agent closer here who isn't coming off a major injury or who isn't near the end of his career.