4) Joba Chamberlain
If Soria gets hurt or struggles for whatever reason, the Tigers will be in some trouble with an already thin bullpen. The current in-house options are far from appealing.
Chamberlain at least stands out a bit due to his amount of experience. This is his ninth season in the majors and Chamberlin has put together a solid career apart from 2013, and he’s looked good to start this year.
Despite some massive issues in the postseason, Chamberlain was decent in Detroit in 2014 (3.57 ERA, 3.16 FIP), although his 9,1 percent walk rate is higher than you would want from a closer. Chamberlain might be nominally next in line behind Soria, although it would take something going wrong for him to become the Tigers closer.
3) Al Alburquerque
Alburquerque is one of the more interesting arms in Detroit’s bullpen. A career strikeout rate of 31.2 percent (thanks to a devastating slider) indicates that Alburquerque has the stuff to be a dominant reliever, and he has put together a couple of very good seasons with the Tigers.
The problem is that Alburqueque’s stuff hasn’t always translated to good results, as he has also had issues with walking batters. Alburqueque was bad in 2013, and he’s off to a disastrous start in 2015 through his first 4.1 innings.
If the Tigers end up in a situation where they need to move on from Soria, Alburqueque wouldn’t be first in line but has name would be on the table. Moving him to more high-leverage situations would be a high-risk, high-reward move.
Next: No. 2 - No. 1