That's the Rams logo blended with the OKC Thunder logo, part of a project to combine NBA logos with NFL logos via Reddit.
Obviously, they used the Thunder since St. Louis doesn't have an NBA team (and who knows how much longer they'll actually have an NFL team either). I wondered why they didn't use the old Spirits logo, but then I remembered it looked like this:
Um, yeah.
A side benefit, Seattle folks don't like the Thunder very much because of that whole greedy owner relocation issue.