Tigers have Benoit, who just had a great year. Previously, pretty good middle reliever. Before that, 54 utterly s***** starts. Always the same sequence. Detroit's problem is that their whole bullpen is bad, not that they don't have an adequate closer.
Koji Uehara this year, taking over from whoever else was closing. Jim Johnson, decent middle reliever given a shot at the closer job, goes from 9 saves to 51. Joe Nathan, failed horribly as a starter with San Fran, has a good year in the bullpen as a middle reliever, tried out as closer in 2004 with the Twins where he racked up 44 saves. Mariano Rivera, came up as a starter in 1995, and blew chunks. Moved to the BP where he excelled for a year while Wetteland closed. Moved to closing in 1997 and the rest is history. Sergio Romo, really good reliever, eventually 8th inning guy, took over as a successful closer after the departure of Wilson.
I feel like I shouldn't need to go on, but I probably do because it might go over your head.