Jayne Kamin-Oncea-USA TODAY Sports
Each of the previous entries on this list bolstered the UFC roster in some sense, whether through adding promising young talent, a marketable name or an immediate title contender. But none changed the face of the promotion, nor the sport, like the UFC's introduction of a women's division earlier this year.
We could probably leave it at that, but in keeping with the theme of ranking individual fighters, let's take a look at the most influential female mixed martial artists to have debuted in 2013 so far.
The bracketed information next to each name is: Debut event, debut result, age.
5. Cat Zingano (TUF 17 Finale, Won vs. Miesha Tate, 30)
In terms of pure talent, Zingano ranks better than five on this list (I would have her at No. 3), but she isn't as recognizable as a couple of her colleagues, and missed an opportunity to change that when she went down with an injury, forcing her out of a TUF coaching role.
Still, Zingano is a title challenger in a new, shallow division, so she is already playing a valuable role for the organization.
4. Liz Carmouche (UFC 157, Lost vs. Ronda Rousey, 29)
It seemed that Carmouche was kind of randomly selected to fight Rousey at UFC 157, but she showed that she is a serious talent, even in defeat.
Her performance gained her a little notoriety, and she's now a fairly recognizable name by WMMA standards.
3. Miesha Tate (TUF 17 Finale, Lost vs. Cat Zingano, 26)
Behind Ronda Rousey, Tate is the biggest name on the UFC's WMMA roster. Her budding rivalry with Rousey and upcoming part as her counterpart on The Ultimate Fighter make her a key piece of the division.
She is also talented, though the threat she actually poses to the champion is somewhat contentious at this point.
2. Sara McMann (UFC 159, Won vs. Sheila Gaff, 32)
McMann is an Olympic silver medalist in wrestling who maintains a perfect 7-0 MMA record. She is a much more low-key personality than Tate or Rousey, but she is charismatic in her own way, and, as WMMA gains popularity, she will become a star.
She also happens to be the biggest threat to Rousey's title right now.
1. Ronda Rousey (UFC 157, Won vs. Liz Carmouche, 26)
The face of WMMA, Rousey became something of a rock star in 2012 and will only become more firmly entrenched in the spotlight going forward.
With a UFC title and a TUF coaching job locked down, you'll be seeing and hearing a lot from her over the next several years.
Love her or hate her, she is the forerunner of change in the sport, and that is huge for the UFC.