Can you tell me what this is?

[n00dles566]

Hey everyone. Hope all of you are enjoying New Years and getting time off from work!

I've had a question for quite a while now and have finally taken the time to post it. I've noticed something funny with my rear left wheel since back in July or August and I've done some light searching and still can't really tell for sure what the problem might be.

I don't know if it could be just a simple alignment problem or something more serious so I'd like for you all to look at it and tell me what you think. The problem is with the rear left wheel and it looks like it's aimed a little more inside and leaning inward compared to the rear right wheel. Any guesses??