from the 9/24 AL Closer Report:
A calf injury closes the book on Jenks’ 2009 season. Bobby’s ERA soared from 2.63 in 2008 to 3.71 in 2009, but it’s questionable how much he actually declined. The 28 year-old’s XFIP was 3.86 in ‘08, and a slightly-lower 3.77 in 2009. Jenks’ K rate bounced back this year (5.55 K/9 in ‘08, 8.27 K/9 in ‘09), but a huge 17% home run/fly ball rate put a big dent in his season. He’s basically the same guy: a good late-inning arm, if not an elite one.
With Bobby out of commission, Thornton and Dotel figure to get dibs on any save ops for the Pale Hose. Per Win Probability Added, Thornton (+2.87) has Dotel (+0.74) beat by a healthy margin. Same goes for XFIP (2.92 for Matt, 4.33 for Octavio). Thornton has whiffed 10.72 hitters per nine frames this year, firing a blistering 96 MPH fastball nearly 90 percent of the time.