Add to this the fact that Rob Chudzinski just accepted a job with the Chargers as the tight ends coach/Assistant Head Coach and the 49ers options are dwindling quickly.
At this point, it seems that Hugh Jackson (Raven's QB coach) and Jeff Jagodzinski (former Boston College Head Coach) seem to be the best options.
It looks, though, like the 49ers got the table scraps from the rest the of the league. In his most important hire, Singletary may be suffering from a little paralysis by analysis.
Either way, the 49ers hand is being forced simply because everyone else is being snatched up.