According to the Free Press, the Tigers acquired the Houston Astros' Jose Veras for a prospect (Danry Vasquez) and a player-to-be-named. It will be nice to have
a designated closer him in that organization.
Veras has 19 saves for the Astros this season, and sports a 2.93 ERA.
[Edit - rlew correctly points out in the comments that he's not necessarily going to be a closer.]