According to Troy Renck of the Denver Post, the Diamondbacks have interest in free agent right-hander Jason Jennings.
The D-Backs have an offer out to Braden Looper, but if that falls through Jennings could be next on the list. Jennings last pitched effectively in 2006, when he finished 9-13 with a 3.78 ERA. He lasted just 27 1/3 innings last season. Renck claims the Rangers have also expressed serious interest.