Two fighters unofficially retired from UFC after this weekend, that is Luke Rockhold 37 years and Jose Aldo 35 years.
Both of them are amazing and they had fantastic fights in their carrier but I think it's correct for them to stop fighting at this point.
I will always remember how Luke Rockhold smearing his blood all over Costa face 
https://www.youtube.com/watch?v=QLXTm5yP7aA