bullpen by gmLI (as of 4/14)

Brian Shouse    2.17
Eric Gagne      2.11
Guillermo Mota  1.80
David Riske     1.59
Salomon Torres  1.17
Derrick Turnbow 0.30
Seth McClung    0.28

gmLI: A pitcher’s average LI when he enters the game.
LI (leverage index): A measure of how important a particular situation is in a baseball game depending on the inning, score, outs, and number of players on base, created by Tom Tango.

data and definitions from fangraphs