Rashad Jennings works out for Raiders

The Raiders worked out Rashad Jennings on Wednesday, the free agent running back said on his verified Twitter account and on Facebook. The 28-year-old Jennings showed promise as Maurice Jones-Drew’s backup early in his career, gaining better than five yards per carry in 2009 and 2010. However, Jennings missed 2011 with a knee injury, and he was held…