Frausto debuted in mixed martial arts on February 13, 2009, and faced Karina Hallinan at WarGods: Valentine's Eve Massacre.

[8] Frausto faced Elisha Helsper, who was coming back from a 3-year layoff, at Strikeforce Challengers: Gurgel vs. Evangelista on November 6, 2009, and won the fight by Unanimous Decision.

[13] On May 16, 2010, Frausto dropped down to 125 pounds to face Michelle Ould at TWC 8 – Meltdown in Porterville, California.

[14] She was awarded a victory by verbal submission due to an ankle injury Ould sustained while taking Frausto down.

[20] She defeated Aguilar via split decision and went on to face Megumi Fujii in the tournament final at Bellator 34 on October 28, 2010.

[22] Frausto faced Karina Hallinan at Bellator 35 in a non-title match on March 5, 2011, in Lemoore, California.

[23] Frausto agreed to rematch Jessica Aguilar in a non-title bout at a Bellator event in late October.

[24] However, Aguilar withdrew from the planned fight while recovering from foot surgery and Frausto was booked to face Carina Damm at Bellator 57 on November 12, 2011.

[25] Frausto withdrew from the bout on October 20 after suffering a torn ACL in training and was sidelined for a year.

[44][45] She took a majority decision win over Jessica Gladstone at WCK Muay Thai: Beauty and the Beast in Lemoore, California on May 1, 2014.

[46] Frausto made her third appearance with the promotion against Lindsay Marino at World Championship Kickboxing: Ultimate Conquest on December 4, 2014.