Both Voelker and Bowling came in officially at 171 pounds for their welterweight tilt.
Voelker comes in with the momentum of a win in the last fight between the two, finishing Bowling in a second-round TKO last October. The loss was the first of Bowling's career.
Prior to that, Voelker (23-8) suffered a loss in a controversial technical decision after Bowling couldn't continue following an unintentional eyepoke.
Since dropping the fight to Voelker, Bowling (10-1) returned to action with a decision win over Josh Thornburg in March.
All 18 fighters involved on the card made weight for the event.
In a key women's match that could determine the next contender for the welterweight championship, both Liz Carmouche and Sarah Kaufman came in at 135 pounds even.
Roger Bowling (171) vs. Bobby Voelker (171)
Devin Cole (239) vs. Shawn Jordan (255)
Ovince St. Preux (205) vs. Joe Cason (205)
Liz Carmouche (135) vs. Sarah Kaufman (135)
Adlan Amagov (185) vs. Ron Stallings (184)
Lionel Lanham (202) vs. T.J. Cook (204)
Ben Lagman (185) vs. Anthony Smith (186)
Bill Cooper (154) vs. Maka Watson (155)
Sterling Ford (155) vs. Brian McLaughlin (156)