After turning professional in 2006 Rojas amassed a record of 25–1–2–1 in 11 years before challenging and beating Dominican Claudio Marrero for the interim WBA featherweight title.

[1][2] In July 2018 the World Boxing Association announced that Rojas has been upgraded to 'Regular champion' and that he will be making his first defense against Mexican American boxer Joseph Diaz.

[3] Diaz however, came into the fight overweight, missing the required weight limit by 0.6 pounds.

Diaz would end up handing Rojas his first defeat in 10 years, by a 12-round unanimous decision.

The official scorecards, 118–110, 117–111, and 116–112 were in wide favor of Xu, even though the punch output from Rojas suggested that the fight was much closer than that.