LINK: Article on What We Already Know About Rubber Man

Check out this article from the Washington Post, recapping all we've learned about Rubber Man.

I pulled an excerpt on who they list could possibly be Rubber Man:
"THE CANDIDATES


Ben Harmon (Dylan McDermott): A strong possibility, though perhaps as a reluctant participant. We’ve seen evidence of Ben acting either possessed or having a dual personality. Still, a little too obvious a choice. Also, didn’t he appear to be elsewhere in the house when Vivien and Rubber Man did the deed? Odds: 5/1.




Tate (Evan Peters): We've seen him wear the suit. And having him impregnate Vivien fits in with the speculation that Constance wants to reincarnate her son. It also would explain Constance’s interest in Vivien’s baby. But still ... Odds: 7/1.



Larry Harvey (Denis O’Hare). The fire-scarred and crippled former resident of the Murder House can’t be the Rubber Man, who has two functional arms, unless Larry’s been faking his infirmity Keyser Soze-style. Odds: 50/1


Charles Montgomery (Matt Ross): The house’s original owner and occupant. He’s a long-dead mad scientist, but it’s actually his timid nature that makes him an unlikely candidate. Odds: 15/1

Constance's Husband (Eric Close): In his only and brief appearance, th unnamed, philandering spouse of Constance (Jessica Lange) was killed by his wife during a flashback set in the ’80s. His lack of screen time might rule him out, or could add to the surprise. Odds: 10/1.


Luke (Morris Chestnut): The Harmons’ security guard (and possible object of Vivien’s affection) seems too grounded in the real world. Odds: 25-1



Chad or Patrick: Since they were both victims of the Rubber Man, it wouldn’t make much sense within the narrative. Of course, that’s hardly a disqualifier on “AHS.” Odds: 50/1

Other:Really, it could be anyone — from Yao Ming to Daffy Duck — without being too much of a shock. Odds: 20/1 "

Then, if you're still itching for some information check out AHS Wiki on Rubber Man here.