When a fighter loses for the first time, they give their vcard to the victor. You can collect multiple vcards, but whenever you lose, your whole collection goes to the person who beat you. Basically it's the same concept as lineal championships. For this list I am including amateur bouts. It's not terribly surprising that Rousey has the biggest and best vcard collection in her division. http://www.ufc.com/rankings Code: C: Ronda Rousey Ronda Rousey 1. Miesha Tate Ronda Rousey 2. Cat Zingano Kerry Vera (hasn't fought since 2009) 3. Alexis Davis Ronda Rousey 4. Sara McMann Ronda Rousey 5. Sarah Kaufman Ronda Rousey 6. Jessica Eye Ronda Rousey 7. Amanda Nunes Ronda Rousey 8. Bethe Correia Ronda Rousey 9. Holly Holm Holly Holm 10. Liz Carmouche Ronda Rousey 11. Julianna Pena Ronda Rousey 12. Marion Reneau Julia Avila (hasn't fought since 2013) 13. Jessica Andrade Ayaka Hamasaki 14. Germaine de Randamie Ronda Rousey 15. Lauren Murphy Miesha Tate What is somewhat surprising is that she also has the best collection in strawweight Code: C: Joanna Jedrzejczyk Joanna Jedrzejczyk 1. Claudia Gadelha Joanna Jedrzejczyk 2. Carla Esparza Ronda Rousey 3. Rose Namajunas Teccia Torres 4. Jessica Penne Ronda Rousey 5. Tecia Torres Teccia Torres 6. Randa Markos Ronda Rousey 7. Maryna Moroz Valerie Letourneau 8. Paige VanZant Teccia Torres 9. Joanne Calderwood Valerie Letourneau 10. Michelle Waterson Ronda Rousey 11. Jessica Aguilar Ronda Rousey 12. Felice Herrig Valerie Coolbaugh (hasn't fought since 2010) 13. Juliana Lima Valerie Letourneau 14. Aisling Daly Ronda Rousey 15. Heather Clark Ronda Rousey What's really surprising is that she also has the best collection at featherweight, beating out Cyborg http://www.fightmatrix.com/mma-ranks/womens-featheweight/ Code: 1. Cristiane Justino Cristiane Justino 2. Marloes Coenen Ronda Rousey 3. Julia Budd Ronda Rousey 4. Arlene Blencowe Kyra Purcell 5. Latoya Walker Latoya Walker 6. Faith Van Duin Cristiane Justino 7. Charmaine Tweet Ronda Rousey 8. Daria Ibragimova Yana Kunitskaya (last fought 2012) 9. Jessica Miele Latoya Walker 10. Fallon Fox Holly Holm 11. Annalisa Bucci Amanda English (last fought Dec 2013) 12. Jozette Cotton Jozette Cotton 13. Peggy Morgan Ronda Rousey 14. Amanda Bell Taylor Stratford 15. Amy Coleman Rachael Ostovich edit: added flyweight http://www.fightmatrix.com/mma-ranks/womens-flyweight/ Code: 1. Barb Honchak Ronda Rousey 2. Vanessa Porto Ayaka Hamasaki 3. Jennifer Maia Ronda Rousey 4. Takayo Hashi Ronda Rousey 5. Poliana Botelho Viviane Pereira 6. Julia Berezikova Ronda Rousey 7. Liliya Kazak Antonina Yaroshenya (hasn't fought since 2012) 8. Isabelly Varela Isabelly Varela 9. Roxanne Modafferi Ronda Rousey 10. Brenda Gonzales Miesha Tate 11. Cristina Stanciu Cristina Stanciu 12. Gisele Moreira Silvana Gomez Juarez 13. Silvana Gomez Juarez Silvana Gomez Juarez 14. Virna Jandiroba Virna Jandiroba 15. Tara LaRosa Ronda Rousey Some other vcards of note Code: Megumi Fujii Ronda Rousey Erin Toughill Ronda Rousey Jorina Baars Ronda Rousey Shayna Baszler Ronda Rousey Jessamyn Duke Holly Holm Marina Shafir Cyborg Gina Carano Cyborg Rosi Sexton Cyborg Tonya Evinger Cyborg Ayaka Hamasaki Joanna Jedrzejczyk Miku Matsumoto Joanna Jedrzejczyk Rin Nakai Miesha Tate At it's core, a fighter's vcard collection measures the quality of their current winning streak. It rewards 1. winning lots of fights 2. beating fighters who are winning lots of fights It's obviously not perfect (not even close), but it's not meaningless either and provides a sort of fun shortcut to grasp how significant a winning streak is. total vcard collection Code: 503 Ronda Rousey 88 Cris Cyborg 54 Holly Holm 34 Miesha Tate How were those collections built? Ronda Rousey Code: 1 Hayden Munoz 0 Autumn King (Richardson) 12 Taylor Stratford 0 Ediane Gomes 2 Charmaine Tweet 0 Sarah D'Alelio 0 Julia Budd 210 Miesha Tate I 25 Sarah Kaufman 3 Liz Carmouche 0 Miesha Tate II 24 Sara McMann 161 Alexis Davis 36 Cat Zingano 28 Bethe Correia --- 503 Total Cris Cyborg Code: 4 Vanessa Porto 1 Chris Schroeder 0 Elaine Santiago de Lima 1 Marise Vitoria 4 Shayna Baszler 0 Yoko Takahashi 10 Hitomi Akano 12 Gina Carano 14 Marloes Coenen I 9 Jan Finney 0 Fiona Muxlow 16 Marloes Coenen II 3 Charmaine Tweet 14 Faith Van Duin --- 88 Total Holly Holm Code: 0 Christina Domke 0 Jan Finney 2 Katie Merrill 0 Allanna Jones 2 Nikki Knudsen 0 Angela Hayes 3 Juliana Werner 22 Raquel Pennington 25 Marion Reneau --- 54 Total Miesha Tate Code: 0 Liz Carmouche 14 Rin Nakai 11 Sara McMann 0 Jessica Eye --- 34 Total Despite being on a 7 fight win streak, Gina Carano only had a 12-card collection, which says something about the quality of her competition. Rousey had only collected 15 cards through her first 7 fights (including amateur). Rin Nakai was on a 17 fight non-losing streak and only had a 14-card collection.