The event at the Thomas & Mack Center was promoted by Randy Couture's wife Kim.
Xtreme Couture won seven out of eight fights. The only fight not featuring an Xtreme Couture fighter was the main event between Hector Ramirez and Rick "The Jet" Roufus.
In his first fight outside the IFL after nine fights for the team league, Hieron dominated late replacement Chris Kennedy through three rounds to win the unanimous decision.
Pyle took down UFC veteran Brian Gassaway, advanced to mount and applied an armbar for the win at 4:21 of the first round.
WEC veteran Alessio dropped TUF 4 cast member Gideon Ray with a left hook and finished with punches in only 45 seconds.
TUF 3 finalist Haynes tapped out fellow former UFC competitor Sean Salmon with an achilles lock at 2:49 of the second round.
1. Ryan Hass def. Ian Omalza via submission (armbar) - R1 (3:09)
2. Elena Reid def. Stephanie Palmer via TKO (strikes) - R1 (0:53)
3. Patrick "Kui" Gonsalves def. Shawn David via submission (kimura) - R2 (3:51)
4. JJ Mix def. John Halverson via TKO (strikes) - R1 (4:25)
5. Josh Haynes def. Sean Salmon via submission (achilles lock) - R2 (2:49)
6. John Alessio def. Gideon Ray via TKO (strikes) - R1 (0:45)
7. Mike Pyle def. Brian Gassaway via submission (armbar) - R1 (4:21)
8. Jay Hieron def. Chris Kennedy via unanimous decision
9. Hector Ramirez def. Rick "The Jet" Roufus via unanimous decision