Raquel Pennington's record
It is rather unusual to see a fighter with a negative record in the UFC. From recent memory, I can only remember Mark Hunt and, according to the UFC, also Raquel Pennington, who was billed as having a 5-6 record before her fight against Jessica Andrade at UFC 191.
However, this came as a surprise to me as I was sure she stood at 5-5 after the Holly Holm fight (which you could make a case for Raquel winning, but that's another story).
As we have seen with Marc Raimondi's series on underground MMA events, there is no official record keeping in the sport, so it's hard to say which source is right and which one is wrong.
To the point: according to Sherdog, Pennington's record stands at 6-5 after UFC 191. According to her UFC profile, which uses stats by Fightmetric, her record is 6-6. It seems that you can't see past a fighter's last four fights on the Fightmetric website, so it's hard to say where the discrepancy lies.
Does anyone actually know which loss Fightmetric is taking into account that Sherdog is not?