Duchscherer, like Sheets, missed all of 2009 after establishing himself as an A-grade starter in 2008 2.54 ERA).
Granted Duchscherer was a bit lucky that year (3.69 FIP), he was still a very solid pitcher.
Unlike Sheets, Duchscherer's stuff isn't electric. He relies on a mid-80's cutter and a curve ball that comes in around 69 mph.
Both pitches have been excellent over the course of his career. The cutter has been 2.08 runs above average per 100 pitches, with the curve at 1.25.
Duchscherer succeeds with pinpoint control (2.30 BB/9 career) and inducing weak contact (career .272 BABIP). Another flyballer (41.7% career GB), he's in the right park to succeed.
Duchscherer comes with similar risks as Sheets, and was slightly worse than Sheets pre-2009, so...