Early career Pacheco started his professional career in 2012. He fought only for
American southeastern and
Pennsylvania-based promotions. In 2013, Pacheco signed with
Bellator.
Bellator MMA Pacheco made his debut against Kyle Bolt on February 14, 2013, at
Bellator 89. He won via knockout in the second round. Pacheco was expected to face Luc Bondole on March 21, 2013, at
Bellator 93. However, Bondole was replaced by Pierry Pierre due to undisclosed reasons. Pacheco won via submission due to a keylock early in the first round. Pacheco was expected to face Tyson Jeffries on September 27, 2013, at
Bellator 101. However, Pacheco was called to replace an injured
Perry Filkins against
Brennan Ward in
Bellator season nine middleweight tournament on October 4, 2013, at
Bellator 102. Pacheco had his first professional career's defeat via submission due to a guillotine choke in the second round. In March 2014, Pacheco entered into the Bellator Season 10 Middleweight tournament when
Dan Cramer versus Jeremy Kimball was cancelled. He faced
Brandon Halsey at
Bellator 116 on April 11, 2014. He lost the fight via unanimous decision. Pacheco faced
Keith Berry on October 3, 2014, at
Bellator 127. He initially lost the fight via split decision. However, Berry failed his post-fight drug test and the California commission changed the result to a No Contest. ==Championships and accomplishments==