The reason I am writing this post is because I have noticed, over the past 4 episodes of Season 2, that almost every episode there is a new version of the opening theme. To date, I have counted 3 different versions.
The first version was the original one that aired with the Season 2 premiere episode. The most noticeable things are the announcer's voice and Monroe's growl at the end.
The second version aired with "The Kiss", in this version the announcer's voice and Monroe's growl are different.
The third (and current) version first aired in "Bad Moon Rising", this version has no announcer and the modified Monroe growl.
The video on YouTube is embedded below! (it includes all 3 versions):