
Life in the bullpen is nothing if not liquid. Guys falter, guys step up, there is always somebody ready to take over your role the moment your fail. Especially in a 'pen without a bonafied head honcho.
As such, a guy demoted to Triple A as recently as April is suddenly an important high-leverage reliever for these Blue Jays. Casey Janssen, lovable labrum surgery recovery case, part-time lesbian, and key back of the rotation guy. Who knew?
I certainly didn't. Janssen thrives on his control, painting the corners of the strikezone with aplomb. His 6.1% 2011 swinging strike rate represents a career low and a below-average number, yet here he is, striking out 7 per nine innings, including 13 Ks out of the 44 right-handed batters faced.
Take a look at the average leverage of Janssen's outings, on a steady increase as the season progresses.

As much stick as we all give Farrell, it's encouraging to see him lean on a well-performing relief arm. I understand Casey Janssen's charms but he isn't exactly "my" kind of pitcher.
I still stand by my pre-season assessment of the bullpen - the holdover arms will fare just as well - if not better - than the free agent
Reuters image courtesy of Daylife, leverage stats etc. from Fangraphs.