I've just received word the Tigers have signed reliever Juan Rincon to a minor league deal and have invited him to camp. Rincon spent last season with the Twins and Indians.
His ERA was something like 5.98, so he should be a perfect fit for the Tigers bullpen! No, I don't think he would be the answer as far as a closer is concerned. Hopefully, Brandon Lyon is still being considered for that job.
EDIT (by Ian): Last season, Rincon posted a 5.86 ERA in 55.3 innings, with 39 strikeouts and 24 walks. Right-handers hit .279/.340/.419 against him, while lefties batted .323/.414/.510.
His best season was probably 2004, during which he struck out 106 batters in 82 innings, finishing with an 11-6 record and 2.63 ERA.