I agree with millenniumfalcon on this one as it stands right now, although frankly both those options stink.
Since you did not mention Rashad Jennings, I can only assume somebody was able to snatch him off waivers before you, which is very tough luck.
It looks to me like you definitely want to monitor the waiver wire for any potential RBs, as the MJD injury looks serious, so you will be staring at this unfavorable situation for the coming weeks.
Stephens-Howling is somebody you might add. Another potential add might be Montario Hardesty, who is in line to get a lot of carries the next couple weeks, with rumors in Cleveland that they will sit TRich until after the week 10 bye.
Good luck recovering from this misfortune.
Here's mine (having a bit of bad luck myself this week): viewtopic.php?f=19&t=527243