The Detroit Tigers bullpen has been a source of stress and heartache for the fans for over a decade and do not expect that to change this year. However, trying to make it better is never a bad idea, even on a rebuilding team.
The Detroit Tigers are in a rebuild they will still not have a good bullpen and even with the slow free agent market, they should NOT go after big names. A couple solid and cheap relievers would not be a bad idea, especially for competition with the younger players. If the Detroit Tigers were to make another MLB free agent signing it should not be a premiere free agent or a long contract. A one or even two year deal is long enough.
The Tigers do not necessarily need to sign any one else, but with the slow free agent market they could possibly get a great deal on a solid player.
There are two pitchers out there that would be perfect on a rebuilding Tigers team. One of them will miss about half of the season while the other pitched for three teams last year. Both have pitched on rebuilding clubs and both would be a nice veteran prescence on a young team.